Manifold suits all Hurlcon / Astralpool HX 70 / HX 120 / HX 150 gas heaters. Also suits JX 130, JX 160 wall mount gas heaters. Includes complete manifold, bypass assembly, and pressure switch. 

Also recommend replacing these parts:
HX Heater Seal Kit

For a complete listing of all HX70 & HX120 spare parts, click here:
http://melbournespaparts.com.au/products/hurlcon-astralpool-hx-wx-spare-parts-complete-listing