Hayward Northstar/Tristar/Ecostar 5/8" Shaft Viton Shaft Seal (SPX3200SA) nipples The listed part number is

The listed part number is MTB-311A

or the system may behave in ways that suggest a larger failure than what is actually happening

5/8 inch hole size with 1-3/8 inch face diameter

Improves user confidence and visible control-area quality

this Waterway pressure gauge is a smart option when dependable pressure visibility and a more polished equipment presentation are priorities

Hayward Northstar/Tristar/Ecostar 5/8" Shaft Viton Shaft Seal (SPX3200SA) nipples The listed part number isThe Hayward shaft seal is designed for compatible NorthStar, TriStar, and EcoStar pump applications where a 5 8 inch Viton seal replacement is needed. A part like this is useful because it helps seal the rotating shaft area, supporting cleaner wet end integrity and helping prevent leaks where motion and water meet. This replacement is especially useful when the original shaft seal is leaking, worn, scored, hardened, or no longer sealing dependably.