By Waterway



Model # 570-0425-07

Warranty 1 Year

Alternate Part #'s WW570042507, WWP-05-4081, WWP570042507

Product Description

Pressure Relief Valve Assy 

Tank Body O-Ring 

Drain Plug 

Replacement Cartridge 

Crystal Water Cartridge Filter

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.

Combining high technology features and an easy to service design, the Crystal Water Cartridge Filter is ideal for new and replacement installations.

The Waterway Crystal Water 425 sq.ft. Pool Cartridge Filter model 570-0425-07 is comparable to filter models:

  • Pentair Clean & Clear Plus Cartridge Filter 420 sq. ft model CCP420
  • Hayward  Swimclear Cartridge Filter 425 sq.ft. models W3C4030 & C4030


NSF Listed

2 1/2″ internal piping

2 1/2″ Valve Bulkhead Unions (includes 2″ and 1 1/2″ reducers)

Fiberglass reinforced polypropylene body for superior strength

“Multi-Handle” design

Heavy-duty tamper-proof clamp with removal tool

Industry proven quad-cartridge elements layout

“Start-Service” dial on stainless steel pressure gauge

1 1/2″ bottom clean-out port

Convertible to D.E. by simply changing internals

Product Specifications

Filtration Area:
425 sq. ft.
Plumbing Size:
1-1/2 - 2-1/2" in.
Turnover 8 Hrs.:
72,000 gal.
GPM Rating:

?     Asked on 4/8/2021by Paul Ryder

Is there a diagram for the filter with the dimensions? Is a user's manual available?

A  Answered on 5/6/2021 by InyoPools Product Specialist Robert M.

The Waterway Crystal Water 425 measures 43" tall and 23.5" wide. Click Here to View the Owner's Manual.

?     Asked on 7/8/2020by MY

I have a 30,000 gallon in-ground pool with a sand filter, would like to replace with a cartridge Which one do you recommend or how to size cart.type filter?

A  Answered on 7/8/2020 by InyoPools Product Specialist Lennox H.

Hi, MY.  This Crystal Water 425 sqft Cartridge Filter is more than sufficient for your pool. 

?     Asked on 5/14/2020by George

Thank you for promptly replying to my previous question. Is this filter "complete" upon purchase, Crystal Water 425 sqft Pool Cartridge Filter - 570-0425-07, i.e. cartridges, valve, port connections. etc.

A  Answered on 5/14/2020 by InyoPools Product Specialist Patrick P.

Hi George, Yes the filter is complete with the cartridges. No valve is used on this cartridge filter, so outside of the basic plumbing fittings, glue and teflon tape you will be all set with this filter.

?     Asked on 5/14/2020by George

I need to replace a Hayward C4000 filter. Can I use the existing plumbing for Crystal Water 425 sqft Pool Cartridge Filter - 570-0425-07

A  Answered on 5/14/2020 by InyoPools Product Specialist Patrick P.

Hi George, The plumbing ports for the two filters are not in the exact same location, so you will have a little bit of re-plumbing but nothing major.


Review Summary

 (Average 0  out of 5 stars)
0 Rating
5 star:
4 star:
3 star:
2 star:
1 star: