Intex C1500 Cartridge Filter Pump Review: Is It Worth It?
Updated: 20 hours ago
The Intex C1500 fills an important gap in the company's cartridge-filter range. This review covers the current Intex C1500, model 26635EG.
It's noticeably more capable than the smaller C1000 while still sitting below the higher-capacity C2500. And because the price differences between Intex's cartridge pumps are often fairly modest, we'd choose between them mainly on pool size and circulation needs rather than trying to save a small amount upfront.
That makes the C1500 particularly interesting for the type of above-ground pool many families actually own: roughly 14–15 ft round pools where a smaller 1,000 GPH cartridge system can start to feel underpowered, but moving straight to a much larger filtration setup may not be necessary.
The headline number is 1,500 GPH, but that's not the number we'd use when judging how quickly it can circulate your pool.
The C1500's actual system flow rate is 1,180 GPH, and that figure gives us a much more realistic picture of where this pump fits.
Quick Verdict
The Intex C1500 is one of the most sensible all-round cartridge filter pumps for a medium-sized above-ground pool.
You get a meaningful step up from the smaller C1000, a washable and replaceable Type A cartridge, an automatic timer, HydroAeration and a useful color-coded cartridge indicator.
More importantly, the 1,180 GPH system flow gives the C1500 enough circulation headroom for the pool sizes we'd realistically pair it with.
Intex lists a maximum pool capacity of 9,400 gallons, but our practical recommendation is considerably more conservative. We'd be most comfortable pairing the C1500 with a typical round above-ground pool up to around 14–15 ft, depending on wall height and actual water volume.
Best for: Medium-sized above-ground pools where you want more circulation than a C1000 without moving unnecessarily to a larger system.
Skip it if: You're closer to an 18 ft pool, where we'd rather have the additional capacity of the C2500, or if you'd prefer backwashing to removing and rinsing cartridges.
Intex C1500 Specs at a Glance
The figure we pay most attention to is the 1,180 GPH system flow rate, rather than the 1,500 GPH pump-flow headline. That system figure gives us a more realistic starting point when deciding which pool sizes the C1500 is comfortable handling.
1,500 GPH vs 1,180 GPH: What's the Difference?
This is probably the most important specification to understand before buying the C1500.
The 1,500 GPH figure is the pump flow rate.
Once water is moving through the complete filtration system — including the cartridge, hoses and fittings — the stated system flow rate is 1,180 GPH.
For pool sizing and turnover calculations, we find the system-flow figure much more useful.
Here's what 1,180 GPH looks like at several common pool volumes:
At 4,000–5,000 gallons, that works out at roughly 3.4–4.2 hours; around 7,000 gallons, you're approaching our six-hour maximum.
These are theoretical volume-to-flow calculations rather than a guarantee that every gallon of water has literally passed through the filter once.
Pool water continually mixes, and real-world flow can also drop as the cartridge collects dirt.
That's precisely why we like some extra capacity rather than sizing a pump right at its published upper limit.
What Size Pool Would We Actually Use the C1500 On?
Intex gives the C1500 a stated pool range of 700 to 9,400 gallons, but we think the upper figure needs real-world context.
At its 1,180 GPH system flow rate, a 9,400-gallon pool works out at roughly an eight-hour theoretical turnover.
We prefer considerably more circulation headroom than that.
As a general rule, Above Ground Splash would want an above-ground pool filter pump capable of turning over the theoretical pool volume within six hours at most — preferably less where practical.
For that reason, we'd be most comfortable using the C1500 on typical round above-ground pools up to around 14–15 ft, depending on wall height and actual gallon capacity.
That's deliberately more conservative than simply repeating Intex's maximum.
A filter pump rarely spends an entire season operating in perfect conditions.
Cartridges collect debris and restrict flow. Pools get heavier swimmer loads. Wind brings in pollen, grass and leaves. There will also be times when you're trying to recover from cloudy water or an algae problem.
Having some extra circulation capacity makes those situations easier to deal with.
For a pool around 18 ft, we'd rather move up to the larger C2500 if you want to stay with cartridge filtration.
Once you move beyond that size — or if you simply want considerably stronger circulation and easier recovery from heavier debris loads — we'd start looking seriously at larger sand-filter systems such as the SX2800 or SX3000.
Intex's maximum capacity tells you what the pump can support on paper.
Our recommendation is based on where we'd want the pump operating during everyday pool ownership.
What We Like About the Intex C1500
The Cartridge Gauge Is Actually Useful
The C1500 has a small gauge on top of the filter housing that changes between green, yellow and red.
Its purpose is straightforward: give you a quick indication of cartridge condition without removing the lid every time you want to check it.
That's genuinely useful on a cartridge filter.
A clean cartridge allows water through much more easily than one loaded with dirt, oils and fine debris. As restriction increases, the indicator gives you a visual cue that the cartridge needs attention.
We still wouldn't rely on the gauge while ignoring an obvious loss of return flow, but it removes some of the guesswork from routine maintenance.
Type A Cartridges Are Easy to Find
The C1500 uses Intex's Type A cartridge, one of the company's most common filter sizes.
That's an important ownership advantage.
A cartridge pump can be inexpensive and simple to operate, but it quickly becomes frustrating if replacement filters are difficult or expensive to source.
Type A cartridges are widely available, and accessing the filter is straightforward: open the housing, remove the cartridge, rinse or replace it, and reinstall.
There's no sand to scoop out and no multiport valve to operate.
The trade-off is that you physically clean the cartridge rather than backwashing the filter.
Whether that's easier comes down largely to personal preference.
The Automatic Timer Removes a Daily Job
The built-in timer means you don't need to manually switch the pump on and off every day.
Once you've chosen a filtration schedule suited to your pool, the C1500 can handle the routine circulation automatically.
We wouldn't choose a pump solely because it has a timer, but it's one of those features that makes everyday pool ownership easier.
HydroAeration Comes as Standard
Like many current Intex filtration systems, the C1500 includes HydroAeration Technology on the return side.
Intex describes the system as introducing air into the returning water to improve circulation, clarity and freshness.
Our reason for liking it is simpler: the aerated return creates visible water movement at the inlet and helps distribute returning water around the pool.
We wouldn't choose the C1500 purely because of HydroAeration, but it's a useful addition.
What's Included With the C1500?
The current C1500 setup includes the core components needed for filtration, including the cartridge filter pump, two 1.5-inch connector hoses, one Type A cartridge and a HydroAeration inlet fitting.
The US 110–120V model also includes GFCI electrical protection.
One thing to check is the plumbing already fitted to your pool.
Plunger valves and some 1.5-inch pool-side fittings aren't included, so don't automatically assume that replacing a smaller pump gives you every fitting needed to convert the pool to the larger connection size.
Check what your pool already uses before ordering.
What Is the C1500 Like to Maintain?
This is where the choice between cartridge and sand filtration becomes very personal.
With the C1500, there's no backwashing.
Instead, you periodically open the housing, remove the Type A cartridge and rinse accumulated dirt from between the pleats.
Once the cartridge no longer cleans effectively, becomes damaged or the flow doesn't recover properly after cleaning, replace it.
We prefer that approach to telling you that every cartridge must be replaced after an arbitrary number of days.
Pool conditions vary too much.
A lightly used covered pool is very different from an uncovered pool surrounded by trees, grass, pollen and regular swimmer traffic.
The C1500's cartridge indicator also gives you another useful clue about when the filter needs attention rather than relying solely on the calendar.
If you clean cartridges frequently, a dedicated cleaning tool can also make the rinsing process a little easier. Our Aquatix Pro Pool Filter Cartridge Cleaner review looks at whether its six-jet head offers enough convenience over a standard garden hose to be worth buying.
For some owners, removing and rinsing one cartridge is easier than backwashing a sand filter.
For others, turning a multiport valve to Backwash is much more convenient than pulling a wet cartridge out of the filter housing.
That's one reason we don't describe either filtration system as universally easier.
Intex C1500 vs C1000: Which Would We Choose?
The C1000 and C1500 aren't separated by enough money for us to make this mainly a price decision.
The more useful comparison is capacity.
The C1000 provides around 750 GPH system flow, while the C1500 steps up to 1,180 GPH.
For a typical smaller round pool up to roughly 12 ft, we'd be perfectly comfortable considering the C1000 if its flow provides enough turnover.
For pools moving toward 14–15 ft, we'd rather have the C1500.
And when the price difference between the two is small, we'd generally lean toward the C1500 for the additional circulation headroom rather than deliberately undersizing the filtration system to save a relatively small amount upfront.
That doesn't mean we'd replace a C1000 that's already keeping a smaller pool clean.
If your existing pump gives you comfortable turnover and the pool stays clear, there isn't much reason to change it.
But when buying new for a medium-sized pool, the C1500 is the more flexible choice.
For the smaller model, see our Intex 1000 GPH Cartridge Filter Pump review.
What About the Larger C2500?
This is where we would avoid automatically buying the C1500 just because it sits in the middle of the range.
The C2500 provides substantially more system flow, and the price increase between Intex cartridge models is often relatively modest.
So if your pool actually benefits from that extra capacity, we wouldn't deliberately undersize the filtration system just to save a relatively small amount at checkout.
Our practical progression is:
C1000 → smaller round pools up to roughly 12 ft
C1500 → typical round pools up to roughly 14–15 ft
C2500 → typical round pools up to roughly 18 ft
Beyond that, we'd start seriously considering larger sand-filter systems such as the SX2800 and SX3000.
The exact diameter isn't the only factor, wall height and actual gallons matter, but this gives you a much more realistic starting point than using the manufacturer's absolute maximum capacity.
Still comparing cartridge systems? See our Best Cartridge Filters for Above-Ground Pools to compare the options we'd choose for small, medium and larger above-ground pools.
Intex C1500 Cartridge vs SX1500 Sand Filter
This is an especially useful comparison because both sit around a similar point in Intex's filtration lineup.
The biggest difference isn't simply the headline GPH number.
It's how you want to maintain the filter.
The C1500 uses a removable Type A cartridge. There's no sand to buy or backwash, but you'll need to open the housing and rinse the cartridge periodically.
The SX1500 uses granular filter media and a multi-function valve. It's heavier to fill initially, but routine cleaning is handled through backwashing instead of removing a cartridge.
So we wouldn't say:
C1500 = better
or:
SX1500 = better
The more useful question is:
Would you rather rinse cartridges or backwash a sand filter?
Pool size matters too. As water volume and debris load increase, a larger sand-filter system can become more appealing because it provides greater filtration capacity without regularly removing cartridges for cleaning.
If you're considering the sand alternative, read our Intex SX1500 Sand Filter Pump review.
What to Know Before Buying
You Still Have Ongoing Cartridge Maintenance
The pump itself is straightforward, but cartridge filtration isn't maintenance-free.
The cartridge captures dirt and eventually needs to be removed and rinsed.
If you already dislike cleaning pleated cartridges, moving to a larger cartridge pump doesn't solve that frustration.
In that situation, a sand filter may suit you better.
Check Your Hose Size Before Upgrading
The C1500 uses 1.5-inch connections.
If you're upgrading from a smaller Intex system with different hose fittings, check exactly what your pool currently uses.
Adapters, plunger valves or larger fittings may be required depending on the setup.
It's a small compatibility detail, but it's worth checking before the pump arrives rather than discovering that you need another order of parts.
Pros and Cons
What We Like
Useful mid-range capacity. The 1,180 GPH system flow fits neatly between the C1000 and C2500.
Good practical fit for 14–15 ft pools. That's where we think the C1500 makes the most sense rather than pushing it toward its published maximum.
Useful cartridge indicator. The green/yellow/red gauge makes it easier to see when the filter needs attention.
Widely available Type A cartridge. Replacement media is easy to source.
Automatic timer. Daily filtration doesn't need to be switched manually.
No backwashing required. You don't need a backwash hose or routinely discharge pool water during filter cleaning.
HydroAeration included. Intex's aerated return fitting comes as part of the system.
What We'd Consider Before Buying
Cartridges still need hands-on cleaning. You'll periodically need to remove and rinse the filter.
The manufacturer's maximum pool rating is optimistic for our preference. We'd want more circulation headroom than an eight-hour turnover.
1.5-inch plumbing can complicate an upgrade. Smaller pools may require additional fittings or adapters.
More capacity may make sense for only a little more money. If you're approaching 18 ft, we'd rather buy the C2500 than stretch the C1500 to its upper limit.
None of those are deal-breakers. They're simply the things we'd want to understand before choosing the C1500.
Who Is the Intex C1500 Best For?
The C1500 makes the most sense for someone with a medium-sized above-ground pool who wants to stay with cartridge filtration.
For a typical round pool, we'd be most comfortable with it up to around 14–15 ft, subject to wall height and actual gallon capacity.
It's particularly appealing if your smaller cartridge pump feels underpowered, you prefer rinsing cartridges to backwashing, and you want enough circulation headroom that the pump isn't operating close to its maximum stated pool capacity.
It's also a logical step for someone who wants more filtration capacity without jumping unnecessarily to the C2500.
Who Should Skip It?
We'd look at the C1000 for a genuinely smaller pool where its lower system flow already gives comfortable turnover.
At the other end, we'd choose the C2500 for a typical 18 ft pool rather than trying to stretch the C1500.
And once you move beyond that size—or if you regularly deal with heavy debris and want more filtration capacity—we'd start looking seriously at larger sand-filter systems such as the SX2800 or SX3000.
We'd also skip the C1500 if you've simply had enough of cleaning cartridges. A larger cartridge filter still requires cartridge maintenance.
Is the Intex C1500 Worth It?
Yes — we think the C1500 is the sweet spot in Intex's cartridge-filter range for many medium-sized above-ground pools.
Its strength isn't that it's a cheap compromise between the C1000 and C2500.
It's that 1,180 GPH of system flow is a good match for the pool sizes we'd realistically pair it with, particularly around the 14–15 ft range.
The Type A cartridge is easy to source, the timer removes a repetitive daily job, and the cartridge-condition indicator is genuinely useful.
What we wouldn't do is buy it simply because the product name says 1,500 GPH or because Intex says it can support 9,400 gallons.
We'd rather size the filtration system with comfortable headroom.
Our rule is simple: aim for a theoretical turnover within six hours at most, and preferably closer to three to five hours where practical.
If the C1500 comfortably achieves that for your pool and you prefer cartridge maintenance to backwashing, it's one of the Intex filtration pumps we'd be happiest recommending.
Related Filtration Guides
If you're deciding between filtration setups rather than simply choosing the C1500, these are the most useful next reads.
👉 For a smaller cartridge option, see our Intex 1000 GPH Cartridge Filter Pump review.
👉 If you're considering moving from cartridges to sand, read our Intex SX1500 Sand Filter Pump review.
👉 For more sand filters, cartridge systems, sizing advice and filtration guides, visit our Filtration & Pumps section.
Frequently Asked Questions
What is the actual flow rate of the Intex C1500?
The Intex C1500 has a 1,500 GPH pump flow rate and a 1,180 GPH system flow rate. For estimating pool turnover, we'd use the 1,180 GPH system-flow figure rather than the larger headline number.
What size pool would we recommend the Intex C1500 for?
Although Intex gives the C1500 a maximum capacity of 9,400 gallons, we'd be more comfortable using it on typical round above-ground pools up to around 14–15 ft, depending on wall height and actual water volume. We prefer enough system flow to provide a theoretical turnover within six hours at most.
Why is our recommended pool size lower than Intex's maximum?
At 1,180 GPH system flow, a 9,400-gallon pool takes roughly eight hours for one theoretical turnover. We prefer more circulation headroom for real-world conditions such as dirty cartridges, swimmers, debris and cloudy-water recovery.
What cartridge does the Intex C1500 use?
The C1500 uses a Type A filter cartridge. It can be removed and rinsed when dirty and replaced when it becomes worn, damaged or no longer cleans effectively.
Does the Intex C1500 have a timer?
Yes. The C1500 includes a built-in automatic timer, allowing routine filtration to run on a repeated schedule without manually switching the pump on and off each day.
Does the Intex C1500 need to be backwashed?
No. It's a cartridge filter, so there is no sand or glass media to backwash. The Type A cartridge is removed and rinsed or replaced when required.
Is the Intex C1500 better than the C1000?
For medium-sized pools, we'd generally prefer the additional circulation capacity of the C1500. The C1000 remains a sensible option for smaller pools where its lower system flow already provides comfortable turnover.
Should I buy the C1500 or C2500?
We'd choose based primarily on pool size and required circulation rather than the relatively small price difference. For typical round pools up to around 14–15 ft, the C1500 is a good fit. Around 18 ft, we'd rather have the additional capacity of the C2500.
Is the Intex C1500 better than a sand filter?
Not automatically. The C1500 avoids backwashing but requires you to remove and rinse a cartridge. A sand filter keeps its media inside the tank and is cleaned through backwashing. The better option depends on pool size and which maintenance routine you prefer.
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