Pool Tool Test Hook [Main Drain Cover] (122) airswitches The Pentair Sta Rite 07017 0079 drain The Pentair Sta Rite 07017 0079 drain body gasket is designed for compatible Vinyl and StarGuard drain applications where the body seal needs replacement The Raypak P R106A AP C complete natural gas heater is designed for pool and spa heating applications where a fully assembled 150K BTU unit is needed The Pool Tool Test Hook [Main Drain Cover] is a service tool used for testing and checking main drain cover security and having the right test tool helps technicians inspect cover attachment and condition during maintenance visits