Compatibility: This air relief valve works with all FNS, FNS Plus, SMBW 2000 Series and 4000 Series, Clean and Clear (ccp100, ccp320, ccp420, ccp520), Quad DE 60, 80 and 100 and all Predator Filters.
Installation: just remove the old pool filter pressure gauge and filter air safety valve, and screw the new pool valve assembly onto the equipment.
100% Satisfaction Guarantee: Buy with confidence, because our high-quality air pressure reducing valve is durable. If you are not satisfied with it at any time within 30 days after purchase, we will provide a refund or replacement.