Please note that the 3" Standpipe Model is not threaded.
Standpipe Model
The Drain Flood Protector standpipe version without a float is available for 3" and 4" drains. The standpipe models are recommended for more extreme or extended pressure situations. In the event of a backup, water rises up the inside of the pipe. The length of the standpipe can be made the length you determine you will need it to be to offer the best possible protection for your situation. Your standpipe height should be higher than the highest point of flooding elevation you have experienced.
How the Standpipe Model Works
To install the 3" standpipe version, the Drain Flood Protector has a rubber gasket the standpipe is inserted into and both are then lowered into the drain pipe. The screws are fully tightened once it has been lowered inside the drain pipe to ensure a tight seal. The rubber gasket will receive 1-½" PVC, ABS, galvanized or other iron pipe sized piping like stainless steel or brass. The standpipe must not have an outside diameter greater than 2".
The 4" standpipe model is threaded, and takes 1-½" IPS pipe, galvanized, stainless steel, brass and ABS or PVC male adapters. The standpipe can be connected before or after the Drain Flood Protector's screws are tightened into the drain.
Be sure to highlight the location of each standpipe with bright tape, ribbon or something else - they can be difficult to see, and far too easy to walk into or trip over.
*If you can't get a tight tight fit, try wrapping it with this special rubber tape we offer here.