The Pentek 156037 is the mounting kit for the ST-1 stainless steel water filter housing. The 156037 mounting kit can be found here:
http://www.waterfilters.net/156037-S...it_p_0-46.html
We also have the following accessories for the ST-1 stainless steel water filters housings:
The Pentek 143216 O-ring Gasket for the Pentek ST-1:
http://www.waterfilters.net/Pentek-1...ngs_p_0-9.html
The Pentek 143220 Head Nut Kit for the Pentek ST-1 Stainless Steel Housing:
http://www.waterfilters.net/143220-H...gs_p_0-11.html
The Pentek 143339 Head Nut Gasket for the Pentek ST-1 Housing:
http://www.waterfilters.net/Pentek-1...gs_p_0-13.html