Hayward SP1091CV In-Line Combo Hose Adapter and Check Valve cleaner They have a bayonet-style connection

They have a bayonet-style connection that fits any 3M™ Bayonet Reusable Respirator offering low breathing resistance and good balance with a slim design

Fits Pentair Kreepy Krauly pool and spa automatic pool cleaners

Fits Zodiac Jandy DEV series D

Skimmer vacuum plate with 1-1/4 and 1-1/2-inch combo hose adapter

This cartridge element is designed to use with Pentair Clean & Clear aboveground pool and spa filter

Hayward SP1091CV In-Line Combo Hose Adapter and Check Valve cleaner They have a bayonet-style connectionHayward SP1091CV In Line Combo Hose Adapter and Check Valve In line combo hose adapter and check valve Made of ABS plastic material By utilizing the skimmer basket instead of the pump strainer basket, the need to turn the pump on and off has been eliminated Simply attach the appropriate Skim Vac to the vacuum hose locate over the skimmer basket and begin vacuuming It accepts 1 1 2 inch and 1 1 4 inch pool hose