Test Nipple Kit

Set of 9 Hard Anodized Backflow Test Fittings (3-1/4”) (3-1/2”)(3-3/4”) . These fittings look the same as the regular anodized fittings but the hard anodizing creates a surface that is only second to diamond in hardness.
Fittings also have a larger O-ring that makes sealing easier and a recessed groove for the o-ring to seal on. 
The fittings are anodized in different colours to make them harder to leave behind when your done.