Astral Main Drain - 237mm Stainless Steel Drain

Manufactured in AISI316 Stainless Steel. Complete with a 2" BSP side connection which, can be plugged from the inside for pressure testing; Model 26196 also has a 1.5" BSP bottom connection for installation of an hydrostatic relief valve and drainage tube. Grille diameter of 190mm and maximum flow rate of 13m3 per hour (28600gph).

Astral Drains - Hydrostatic Valve

To alleviate pressure which underground water can cause to build up under the pool shell causing structural damage. It is recommended that a hydrostatic valve (code 00277) and drainage tube (code 21581) are fitted to main drains. The hydrostatic valve threads into the bottom of the main drain. Made in ABS and stainless steel with a 1.5" male BSP thread.

Astral Drains - Hydrostatic Valve Drainage Tube

To alleviate pressure which underground water can cause to build up under the pool shell causing structural damage. It is recommended that a hydrostatic valve (code 00277) and drainage tube (code 21581) are fitted to main drains. The hydrostatic valve drainage tube threads into the bottom of the main drain. Made in ABS with a 1.5" male BSP thread.