The links below are provided for reference.
Air Pump Water Solutions : www.air-pump.com
Ametek : See Pentek.
Amtrol, Inc. : www.amtrol.com
Aquatec Water Systems : www.aquatec.com
Clack Corporation : www.clackcorp.com
Culligan : www.culligan.com
Enpress : www.enpress.com
Enting Water Conditioning : www.enting.com
Evoqua (formerly Siemens Water Technologies): www.evoqua.com/en
Farris Enterprises : www.farriswater.com
FilmTec : www.dowwaterandprocess.com
Flowmatic : www.watts.com
Fleck Controls, Inc. : www.pentairwatertreatment.com
Fluid Systems : see Koch Membrane Systems.
GE Water Technologies : www.gewater.com
Good Water Warehouse : www.goodwaterwarehouse.com
Hanna Instruments : www.hannainst.com
Harmsco Water Filtration : www.harmsco.com
Hydranautics : www.membranes.com
Hydrotech : www.hydrotechwater.com
Hytrex : See GE Water.
Jaco : www.jacomfg.com
JohnGuest : www.johnguest.com
KDF (Fluid Treatment, Inc.) : www.kdfft.com
Koch Membrane Systems : www.kochmembrane.com
KX Technologies : www.kxtech.com
G.A. Murdock : www.gamurdock.com
Nelsen Corporation: www.nelsencorp.com
Omnipure : www.omnipure.com
Osmonics : See GE Water.
Pentek : www.pentekfiltration.com
Plymouth Products : See Pentek.
Pro Products : www.proproducts.com
Procon : www.proconpumps.com
Pura : See Hydrotech.
Purtrex : See GE Water.
QMP, Inc. : www.qmpusa.com
Stenner : www.stenner.com
Safe Water Technologies : www.swtwater.com
Toray Membrane USA, Inc. : www.toraywater.com
Siemens Water Technologies : See Evoqua.
Water for People : www.waterforpeople.org
(whole house & well units)