Bottom drain dye tester - leak detector.This silicone cover seals the bottom drain so the clear tube can be dye tested. This will verify the integrity of the bottom drain mud collars and plumbing underneath. The sucking action will be unmistakable when a leak is detected.
This dome covers drains up to 8" in diameter- normal size bottom drains.
Its best to shut the bottom drain valve off before you test.
Buy a pair for dual bottom drains!
We also have a 10" professional model that can be attached to a pool pole.