Culligan Whole House Water Filters

This page carries Culligan whole-house replacement cartridges, including the P5, S1A, P1, CW-F, SCWH-5 and R50-BBSA. Most fit the Culligan HF-360B valve-in-head housing, and the R50-BBSA fits the HD-950A and WH-HD200-C heavy-duty housings. Three undersink cartridges, the D-10A, D-15 and D-30A, are also listed here.

Whole-house vs undersink Culligan cartridges

Culligan D-series cartridges are undersink drinking-water cartridges, not whole-house cartridges. The D-10A and D-30A fit the Culligan US-600A undersink system. The D-15 fits the Culligan RVF-10. For complete systems, see our Culligan undersink water filters.

Common questions

How often should you change a Culligan whole house filter?

A Culligan whole house filter should be changed on the schedule Culligan rates for that cartridge: about 2 months or 8,000 gallons for the P5, 4 months or 16,000 gallons for the S1A, and 6 months or 24,000 gallons for the R50-BBSA.

Which Culligan cartridge fits the HF-360 housing?

The Culligan HF-360B housing takes the SCWH-5, CW-MF, S1A, CW-F, P5 and P1 cartridges. Choose by micron rating: the P5 is 5 micron, and the S1A is 20 micron.

What micron is a Culligan P5 vs S1A?

A Culligan P5 is a 5-micron cartridge, and a Culligan S1A is a 20-micron pleated cartridge. The finer P5 is rated for about 2 months, and the S1A for about 4 months.

How do I know which Culligan housing I have?

You can identify your Culligan housing by reading the label on the housing cap. Once you know the model, use our whole house cartridge filter finder to match a cartridge. Need a new housing? Browse our whole house filter housings.