Adapt-A-Valve Extendable Valve backwater valve adapt-a-valve pricing for our extendable valve

Adapt-a-valve is unique and economical in that it can be buried in the ground without a vaultRecommended Brand: Mainline Adapt a valve backwater valves Models:
ML-3XA (3" ABS), ML-3XP (3" PVC), ML-4XA (4" ABS), ML-4XP (4" PVC)

With widespread record rainfall across the nation, and with widespread development that over-burdens the capacity of municipal sanitary sewer systems, basement flooding is occurring at record levels.  Many officials are urging homeowners to install backflow valves and are changing new construction code requirements to incorporate backflow valves in sewer lines between the home and street.

Our "Fullport Backwater Valves" are designed to be installed on the inside of a home or building in the basement floor.  In some installations, predominantly when the home is build on a concrete slab or above a crawlspace, it is not possible to install a backflow prevention valve on the inside of the building.  The Mainline "Adapt-A-Valve" is designed as an economical valve to be installed outdoors in the ground. (see drawing at right)

adapt a valve backwater valve installationadapt-a-valve gate shown with hinge at topA key point in using our Adapt-A-Valve is that it DOES NOT require the installation of an expensive underground vault.  This is accomplished by the innovative use of a removable gate cassette and the extendable valve design.

The adapt a valve is installed in the main sewer line between your home and the street, and a piece of standard DWV (Drain Waste Vent) pipe is cut to length to reach the surface.  A standard DWV cap is attached to allow access to the removable gate cassette below.  (Note: extra DWV pipe & cap is not included, but is always available at your local home center or supply.)

adapt-a-valve extended removable gate cassetteAdapta valve shown with DWV extension and lidA piece of 3/4" PVC is also cut to length and a 3/4" PVC tee is attached to the top end of this pipe to act as a "tee handle".  The bottom end of this pipe is attached to the removable gate cassette.  This unique feature allows the gate to easily be removed for cleaning, or in the event the drains need to be snaked, without any digging.  (Note: extra PVC pipe & tee not included, but is always available at your local home center or supply.)

Universal Plumbing Code UPC SealAll of the listed components (cassette + extension adapter, backwater gate, air gate component, extension body + extension collar and cleanout lid) have been approved by the Universal Plumbing Code and IAPMO.

Additionally, depending upon the nature of your specific installation (consult your local plumbing contractor and plumbing code), the adapta valve may be used in a "normally closed" or optional "normally open" configuration.

IMPORTANT NOTE: Pipe end-to-end, the Adapt-A-Valve takes up 6" of run in your line.  The outlet is 1-1/2" LOWER than the inlet, so in just 6", the level of the pipe at the outlet side now needs to be 1-1/2" lower.  Depending upon the amount of slope in your line (2% minimum is required for proper operation), you may need to replace from 8 to 10 feet of pipe downstream from the valve to average out this "loss" of 1-1/2" of fall.

adapt a valve gate shown with bottom hinge adapt-a-valve shown in gate-open installation configuration Normally-Open Extendable Valve BWV configuration -
  • Installed with gate in horizontal position
  • Air-Gate floats gate to closed position on Reversal Flow
    ( 4" ONLY - Requires part  #PA4CassNO)
  • No flow restriction
  • Air-flow not restricted
  • Self-cleaning action
  • O-ring seal
 
adapta valve gate shown with hinge at top adapt-a-valve shown in gate-closed configuration Normally-Closed Extendable Valve BWV configuration
  • Installed with gate in hanging position
  • Light weight gate construction
  • No Air-Gate
  • Double hinge design