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Home Waterway Crystal Water Cartridge Filter | 425 Sq. Ft. 150 GPM | 570-0425-07
NOTICE: The pool & spa industry continues to face industry-wide shortages on many products that most vendors expect to last late into 2022. We're allowing items to be purchased so that customers who choose to wait will have their order shipped when product is available. Most vendors are not providing any ETA on when items will be available. WE WILL EMAIL YOU RIGHT AWAY IF YOUR ITEM IS BACKORDERED. 

Waterway Crystal Water Cartridge Filter | 425 Sq. Ft. 150 GPM | 570-0425-07

Waterway Crystal Water Cartridge Filter | 425 Sq. Ft. 150 GPM | 570-0425-07

Parts AvailableParts Available
Platinum Preferred Manufacturer
  • Combining High Technology Features and an Easy to Service Design
  • Fiberglass Reinforced Polypropylene Body for Superior Strength
  • Convertible to D.E. by Simply Changing Internals
  • Heavy-Duty Tamper-Proof Clamp with Removal Tool
  • Cluster of 4 Cartridge Elements for Ease of Maintenance and Longer Cleaning Cycles
  • Waterway Bulkhead Fittings Reducer 1 1/2" to 2" | Black | 421-4071B
    Waterway Bulkhead Fittings Reducer 1 1/2" to 2" | Black | 421-4071B

  • Waterway Slide Valve Replacement Parts | 2.5" to 2" Reducer Socket | 421-4201
    Waterway Slide Valve Replacement Parts | 2.5" to 2" Reducer Socket | 421-4201

  • Waterway Bagged 2 1/2" Union Nut | 415-6001B
    Waterway Bagged 2 1/2" Union Nut | 415-6001B

  • Waterway 2-1/2" Tailpiece with Piston O-Ring Groove | 417-2201
    Waterway 2-1/2" Tailpiece with Piston O-Ring Groove | 417-2201

  • Waterway O-Ring 2 1/2" Union | 805-0232B
    Waterway O-Ring 2 1/2" Union | 805-0232B

Combining high technology features and an easy to service design, the Crystal Water Cartridge Filter is ideal for new and replacement installations.
The only cartridge filter on the market with 2-1/2" internal piping, improves flow and reduces system noise when using 2-1/2", 2" or 1-1/2" plumbing. Using four cartridge elements, the Crystal Water Cartridge Filter offers a superior choice for easy maintenance and crystal clear, clean water.
  • NSF Listed
  • 2-1/2" Internal plumbing (largest in the industry) minimizes restrictions and improves water flow
  • Four-cartridge design simplifies element removal and extends time between cleaning cycles
  • State-of-the-art internal design provides greater and more efficient filtration
  • Chemical resistant fiberglass reinforced polypropylene tank for exceptional strength and long life
  • Easy-out filter pack makes servicing easy
  • Commercial grade stainless steel pressure gauge - best in the industry
  • Heavy-duty tamper-proof clamp
  • Start (Clean) - Dirty Indicator on Stainless Steel Pressure Gauge
  • 2-1/2" Valve Bulkhead Unions (includes 2" and 1-1/2" reducers)
  • 1-1/2" bottom clean-out port
  • Convertible to D.E. by simply changing internals
The Crystal Water Cartridge Filter should be at the top of the list when considering swimming pool and spa filtration. Four cartridge elements make for longer cleaning cycles, which helps the Crystal Water Cartridge Filter to be the fastest growing choice for pool professionals. For the clearest, most inviting water, choose the Crystal Water Cartridge Filter.
Pool Turnover
Filtration Area Flow Rate 6 Hours 8 Hours
425 sq. ft. 150 GPM 54,000 72,000

Square Foot
Q & A
Start typing your question and we'll check if it was already asked and answered. Learn More
Browse 12 questions Browse 12 questions and 14 answers
Are the 4 cartridge elements included with the filter?
tony c on Jan 11, 2016
BEST ANSWER: yes filters are included
Does the tank come with filters?
A shopper on Apr 22, 2017
BEST ANSWER: Yes it does
What size pump can be used with this system?
staci s on Mar 8, 2021
Does Model 570-0425-07 replace 570-0245 which is no longer available?
A shopper on Jun 1, 2019
Waterway Crystal Water Cartridge Filter | 425 Sq. Ft. 150 GPM | 570-0425-07 Is this a good filter for 22,000 gal. in ground?
A shopper on Apr 25, 2021
BEST ANSWER: Yes.. I have 25000 gal in ground pool. So far very happy since installation about a month ago.
Do you have 570-0425-07 in stock?
A shopper on May 14, 2021
Can it be used on a salt pool?
staci s on Mar 4, 2021
BEST ANSWER: Yes, that's the type of pool that i have
The band is off around the middle but I can not get the top piece off so I can clean the cartridges. How do I get it apart?
A shopper on Aug 15, 2020
BEST ANSWER: You must either release the pressure at the gauge or open up the bottom drain on the filter to release the pressure and then the vacuum will release the seal.
Can this be used with an above ground pool?
Karen L on Jun 7, 2021
BEST ANSWER: I don’t know but it only lasted one year. I have reached out to pool supply unlimited and have yet to get a response. Go somewhere elseEnter an answer to this question.
I have a 22,000 gallon pool is this the right size?
A shopper on Apr 25, 2021
Does this filter require backwash valve or are they cleaned manually?
A shopper on Mar 18, 2021
How many gpm?
A shopper on Mar 20, 2019
4.1 / 5.0
7 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Rated 5 out of 5
waterways crystal water filter
I bought this filter to replace a waterways filter which had failed after several years of service. I have continued to buy this brand for several reasons. (1) parts are easy to obtain (2) the 2 and one half inch fittings give much better flow than the standard two inch fittings and (3) the price compares favorably with other filters on the market. I was impressed with the speed of shipping The filter arrived in just three days and it took me all of fifteen minutes to install it as the new fittings married perfectly with the old fittings. One question that I have which I haven't checked on is whether or not my .old cartridges will fit on this new model I have had this filter running for several weeks and it keeping the water clear.
Bill Langley
December 18, 2016
over 5 years ago
Rated 3 out of 5
After searching prices pool supply was the best, even though
The shipping is high. But with the rebate price is still good.
But cannot get a shipping date and no answers from phone calls or emails.
May 3, 2021
1 year ago
Rated 5 out of 5
Works great !! Pool was never cleaner before!
Easy to install.. works quietly. My pool is super clean now.. definitely needed the 400sq Ft cartridge.
The filter was deliver very quickly (within a couple of days) eventhough the ETA was not clear on the website.
April 13, 2021
1 year ago
Rated 5 out of 5
A great replacement
Our old DE filter grids finally tore so it was time for a replacement.
Service was amazing with getting it ordered and shipped right away (thankfully they had it at the local DC in Phoenix, AZ.
Easy to install and after running our pump overnight the water was crystal clear and ready to swim in!
April 18, 2021
1 year ago
Rated 5 out of 5
Best in the business
Good products. Great service. Best pool site online. Fast shipping, too. Will buy from again.
October 20, 2019
over 2 years ago
Rated 5 out of 5
Another great buy from Pool Supply Unlimited
My pool guy helped me pick the perfect filter with the best price. He just happened to find it at the same place I previously got a pool pump for much less than anywhere else. Very pleased because my pool is working perfectly now!
August 7, 2021
10 months ago
Rated 1 out of 5
Never recived the item
Been trying to track and cancel for a long time
Finally after couple weeks of tracking purchase another one installed it same day
Still dealing with pool supply to get my money back

Thank you
May 9, 2021
1 year ago
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Pool Supply Unlimited is an e-commerce company that loves water. We love to pump it, filter it, heat it, chlorinate it, light it up and stare at it while we're barbequing a fat, juicy steak. There are real pool professionals working here. Our guys have seen thousands of pools in their careers, no exaggeration. We are based in Southern California and can land most products to your door (within the 48 contiguous states) in less than a week.
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