
We buy one about every 2-3 years here in Arizona because of the hard water, even though we have a water softening system throughout the house. When the flow slows down to find that the reservoir glue isn't replenishing fast enough, it's time for a new diaphragm. We also buy this kit every year for annual maintenance. http://www.amazon.com/Watts-Premier-531105-RO-Pure-Annual/dp/B002YOQ0C2?ie=UTF8&redirect=true&ref_=cm_cr_ryp_prd_ttl_sol_66

Filter under the sink Aquaphor Favorit ECO silver
20 Review

NANPU 3/8" NPT Compressed Air Filter Regulator Combo Piggyback, 5 Micron Brass Element, Poly Bowl, Semi-Auto Drain, Metal Bracket, 0-150 Psi Gauge
26 Review

NANPU Air Drying System With Double Filters And Pressure Regulator Combo For Clean And Controlled Air Supply
18 Review

π§ NANPU 1/2" NPT Compressed Air Filter Regulator Combo Piggyback with Auto Drain, 5 Micron Brass Element, Poly Bowl, Metal Bracket, and 0-150 psi Gauge
18 Review