The gunite model features a built-in "no leak" flange. The concrete model features 2 gaskets to seal the inside and outside of the pool. Self-cleaning side outlet molded with both 1 1/2" (38 mm) female slip and 2" (51mm) male slip connections. Anti-vortex cover rated at 82 GPM (186m3/h)
Can be used with or without a hydro-relief valve (includes provision for attaching a hose nipple during pool maintenance).