Waterway DynaFlo Plus/DynaFlo Low Profile Round Weir Assembly [2 Pieces] [Grey] (550-2637) sandfilters the PS-1903 gives the rebuild

the PS-1903 gives the rebuild a more premium foundation

Lasco Schedule 40 PVC coupling

or collapsed from age and repeated use

Raypak combination gas valve

Waterway DynaFlo Plus/DynaFlo Low Profile Round Weir Assembly [2 Pieces] [Grey] (550-2637) sandfilters the PS-1903 gives the rebuildThe Waterway 550 2637 round weir assembly is designed for compatible DynaFlo Plus and DynaFlo low profile applications and comes as a 2 piece assembly in gray. A part like this is useful because it restores the skimmer door action that helps regulate surface water entry into the skimmer housing. Weir assemblies play an important role in surface skimming performance, and replacing the correct version helps preserve the original movement and fit inside