Waterway Union Assembly [1-1/2" Slip x 1-1/2" Slip] (400-4000) brettaqualine and this generic replacement blade

and this generic replacement blade version is intended for 2 inch tubing tool applications using the 4682-B reference

or hydraulic performance

A burner orifice is useful because it helps meter the gas flow correctly for the supported fuel type

The 25141-540 is a practical service part when a compatible Baker Hydro style skimmer needs a weir to restore dependable surface-skimming action

while the more specific connection format helps preserve compatibility in older or version-sensitive plumbing layouts

Waterway Union Assembly [1-1/2" Slip x 1-1/2" Slip] (400-4000) brettaqualine and this generic replacement bladeThe Waterway 400 4000 union assembly is designed for compatible plumbing applications using a 1 1 2 inch slip by 1 1 2 inch slip configuration. A slip union like this is useful because it creates a removable connection point within rigid plumbing while keeping both sides in a straightforward solvent weld format. This is especially practical in pool and spa plumbing systems where later service, pump removal, or line access may be necessary. Using the