Free Shipping on orders over $99 | FREE 365-DAY RETURNS
Filters Fast Logo Header

Watts WPC1FF20 Replacement for Watts FM-BB-20-1A


Retail: $59.99 /ea
You Save: 17%
Buy 1 - 7 for $49.95 ea.
Buy 8+ for $47.95 ea.
As low as
Retail: $59.99
You Save: 17%
in stock
Ready to Ship! Home Filter Club
Home Filter Club

Sign up for the Home Filter Club in checkout. You choose how often you want your filter, and we take care of the rest.

The Watts WPC1FF20 Replacement for Watts FM-BB-20-1A cartridge is used primarily in whole house water filter systems to reduce sediment as well as many contaminants such as dirt, turbidity, limescale, rust, sand, silt, and other common particulates and impurities. This Watts 20 Inch pleated water filter uses advanced synthetic pleated polypropylene filtration technology for a larger filter surface area, longer cartridge life, higher flow rate, greater dirt holding capacity, lower pressure drop, and more efficient sediment filtration when compared to other sediment filters which use different types of filter media. Does not contain binders or additives. This Watts filter has a 4.5" diameter and is consided Large/Full Flow. It features higher flow rates than standard diameter (2.5") filters.


  • Brand: Watts
  • Part Number: WPC1FF20
  • Replaces Part Number: FM-BB-20-1A
  • Pack Size: 1
  • Filter Life: Approx. 6 months
  • Filter Media: Pleated polypropylene
  • Dimensions: 20" x 4 1/2"
  • Micron Rating: 1 Micron
  • Flow Rate: 25 GPM
  • Temperature Range: 40 to 140 F
  • Max Operating Pressure: 40 psid
  • Recommended Change Out: 25 psid


Compatible Parts:

The Watts WPC1FF20 Replacement for Watts FM-BB-20-1A is the correct replacement for the following part numbers:

Part Number
Hydronix SPC-45-2001
Watts FM-BB-20-1A
No results for {X}

Compatible Models:

The Watts WPC1FF20 Replacement for Watts FM-BB-20-1A is correct replacement for the following model numbers:

BrandModel NumberDescription
No results for {X}


Customer Reviews:

Total Reviews: 1 | Average Rating: 5 / 5.0


I live in rural Indiana with extremely hard water and clear iron. I bougt this filter to replace the original sediment filter that came with my whole house filtration system. I've had my system only about 4 months and I am starting to see iron and hard water build up on my appliances, showers, toilets and washing maching. The original sediment filter was a 20 micron filter. I decided with the money I was saving buying from, I'd spend a little extra and upgrade to this 1 micron filter. Since I am living on a well I am assming the cyst filtration qualities of this filter will be a benefit. A quick unscientific way to check for clear iron in your water is to put some bleach in a glass of water and it will immediately begin turning a rust color. (this is why ppl with well water tend to have dingy looking whites and it gets worse if they use bleach to 'fix' the problem) I've had this filter installed for 24 hours, I done a few loads of laundry, loads of dishes and the whole family has showered so I feel the water we are using is definitely water filtered by this new filter. I took a glass with water and poured bleach into it and even after letting it sit for hours, there is NO signs of any reddish color from clear iron. I am shocked!! And I am so so so thankful I took a chance on buying this filter. I'm not sure if this filter will make it an entire 6 mos before needing replaced but I'm so glad I have this filter. I am once again in love with my whole home filtration system.

Collected by

Product Availability

Please provide your e-mail address below to receive a notification when this product becomes available:


Thanks! We'll send you a notification when this product is available!