Vac-Sweep Wall Fitting Connector Assembly SR Smith SP Velocity Standard Platform/Setback/SR Frame Colors/TrueTread It has a #9 1-1/2

It has a #9 1-1/2 inch bottom pipe plug and a #9 1-3/4 inch fitting top plug

The units are wall mounted and have plumbing options available (which are sold separately)

This is a replacement comparator for Taylor 2000 Series Test Kits K-2006

These special bolt heads are designed to ensure that swimmers do not injure themselves on traditional hex head bolts

and the nominal ozone output is

Vac-Sweep Wall Fitting Connector Assembly SR Smith SP Velocity Standard Platform/Setback/SR Frame Colors/TrueTread It has a #9 1-1/2This is a Zodiac Replacement Universal Wall Fitting Connector Assembly used with various cleaners such as the Polaris Vac Sweep 180 280 380 3900 Sport, 480 PRO, and 280 TankTrax Pool Cleaner.