Culligan D-10A Under Sink Drinking Water Filter Cartridge, (2-Pack) Upright Vacuums The PermaLock(TM) fastener eliminates nut

The PermaLock(TM) fastener eliminates nut and bolt failure

Standard Malleable Iron Fittings

Nuts With Rubber Gaskets

Water flows normally through the drain until the sewer begins to back up

after crimping you can test each fitting to well over 100 psi

Culligan D-10A Under Sink Drinking Water Filter Cartridge, (2-Pack) Upright Vacuums The PermaLock(TM) fastener eliminates nutD10 replacement filter cartridge reduces chlorine, sediment, bad taste, and odor. 5 micron (nominal) filtration. Activated carbon impregnated cellulose construction. Filter life up to 3 months or 250 gallon. Use with model No. US 600, US 550, and CTR 210 filters. 2 per pack.