Darlly Cartridge [100 sq ft, 3-5/8" OD Bottom x 8" dia x 16-1/2" L] (81004) aquapro A low-flow heater is useful

A low-flow heater is useful because it supports systems that operate with reduced circulation while still delivering dependable heating in a form matched to the supported design

or no longer compatible

A complete unit like this is useful because it combines skimming

Wet end for compatible Dura-Jet 1

Improves return-side performance and installation finish

Darlly Cartridge [100 sq ft, 3-5/8" OD Bottom x 8" dia x 16-1/2" L] (81004) aquapro A low-flow heater is usefulThe Darlly 81004 filter cartridge is designed for compatible filtration applications and offers 100 square feet of filtration area with 3 5 8 inch bottom opening, 8 inch diameter, and 16 1 2 inch length. A cartridge like this is useful because it restores filter performance while matching the original shorter body cartridge design required by the housing. When one end dimension or opening style differs from more common cartridges, careful matching