This part is a PS-3865 which is the upgraded Better version Viton Carbon Graphite version of the PS-1000 Seal. This Seal is used Primarily in Waterway Brand Wet Ends.

NOTE: This Seal does not fit a Waterway Viper or EX2 Wet End..

It is 1 3/8" Across the back of the Spring Seal part that goes into the volute or wet end back and the Ceramic & Rubber part that goes into the impeller is 1 1/4".

The Hole in both parts is about 5/8".

Note: This Seal Fits Waterway Executive, Hi-Flo, Spa Flo, Iron Might, 1 1/2" Center Discharge, E Series and Workman Pump Wet Ends To Install you should put silicon sealant on the back of the Metal part and gently push it into place with a 1" coupler as the push tool. Also the rubber part can use a light coat of silicon to slide it into place in the impeller.

Please note: When you have a seal leaking in most cases you will need an impeller because the leak caused water to get into the metal shaft area that the impeller is screwed onto and expands and damages the impeller. We offer the impellers along with the standard seal in a kit in our store. The Hot Tub Professor on You Tube offers How To Installation Videos on Seals and Impellers.

Note: This Seal does not fit a Waterway 2 1/2" Viper Wet End it uses a PS-200 Seal..