top check backwater valves backwater check valves backwater valves adapt-a-valve information ml fr4 fio valve information termex valve information straight fit backwater valves backwater valve diagram backwater valve features and specifications backwater valve history testimonials backflow prevention information helpful links backwater valve pricing frequently asked questions backwater valve specifications backwater valve installation tips backwater valve animation backwater valve videos contact us backwater valves main page backwater valves backflow prevention links

 

 

Our Frequently Asked Questions Page or . . .

Helpful Links to articles about backflow prevention
and the use of backwater valves to prevent flooding 

flood protection"Backwater Valves - Backwater Sewage Protection" by The City of Edmonton, Calgary, Canada.

flood protection "Main Building Drain Protection" by The Ctiy of Welland, Ontario, Canada

FEMA backflow prevention links  "Flood Insurance & Mitigation Activities" by the Federal Emergency Management Agency (FEMA)

FEMA backflow prevention links  "Mainline Backwater Valves" Search for "Mainline Backwater Valves" on google.com

If you discover a broken link to the "outside" sites listed above, or or something that just plain doesn't make sense on this site (www.backwater-valves.com), please click the Contact Us link and fill in the "comments" part of the form to let us know (-:

Backwater Valve with access box

NOTE: The term backflow preventer, and many other associated terms like backflow preventers, backflow prevention, backflow valve and backflow preventors, as well as the two-word versions back flow preventer, back flow preventers, back flow valves and back flow valve technically refer to "fresh water" backflow valves that prevent possibly contaminated drinking water from flowing from a building back into a public water supply.  Many people confuse the terms backwater (back water) and backflow (back flow) when they are seeking the backwater valves that we offer.  It is understandable that people call what we sell a backflow valve, but the technically correct terminology associates backwater valves with sewage and backflow valves with fresh water.

backflow check valve products

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Adapt-A-Valves

adobe acrobat pdf filesAdapt-A-Valve Brochure (Adobe Acrobat pdf)

Adapt-A-Valve Inspection Chamber

Backwater Valve Diagram
Backwater Valve Features
Back water valves information
Backflow Links
Backflow Preventers
Backwater Valve Animation
Backwater Valve Videos

Basement Drain Backing Up

 contact us about your backwater valve needsContact Us

Flood Alarm

Frequently Asked QuestionsBack water valve questions

adobe acrobat pdf filesFullport Backwater Valve Brochure (Adobe Acrobat pdf)

how to install your backwater valveINSTALLATION TIPS;  how to install backwater valves 

Termex Backwater Valves
Termex Backwater Valve Brochure (Adobe Acrobat pdf)

NEW: TOP-CHECK BACKWATER VALVESnew Top-check backwater valves

Mainline ML-FR4 Backwater Valve (Fio Valve)
adobe acrobat pdf filesML-FR4 Mainline Backwater Valve Fio Valve Brochure (Acrobat pdf)

6" Backwater Valves - Mainline STRAIGHT FIT Backwater Valves

Mainline History

backwater valve measurements and specificationsMeasurements, Specifications and IAPMO Certifications

Testimonials

Mainline Fullport Backwater Valves offer the right solution for your sewer backup problems.

 

Protect Your Home with a Backwater Valve
from Backwater-Valves.com

All Orders must be placed ONLINE by Credit Card

 

telephone For non-order info, you may phone Greg at 330.836.9393 9 AM - 4 PM EST M-F
or Voicemail anytime)

emailEmail: Help@Backwater-Valves.com

copyright 2004 to 12/8/2024 at 22:20:8 ET
Backwater-Valves.com,
Akron, OH, USA.
All rights reserved.

backflow prevention links

backwater-valves.com is independently owned and resells products produced and manufactured by Mainline of Canada and assumes no liability for the installation of backwater valves and related products.

Be sure to check with the plumbing authority in the municipality in which your valve is to be installed to insure that your installation is in compliance with local code, and be sure have your valve inspected by your local plumbing inspector after installation. Inspect your valve frequently; the Backwater Valve through its clear plastic housing top, and the Adapt-A-Valve, by removing the gate cassette.

IMPORTANT NOTES:

Pipe end-to-end, the Adapt-A-Valve takes up 6" of run in your line and the outlet is 1-1/2" LOWER than the inlet, so in just 6" the level of the pipe at the outlet side needs to be 1-1/2" lower.

Pipe end-to-end, the Backwater Valve takes up 12" of run in your line and the outlet is 3/4" LOWER than the inlet, so in just 12" the level of the pipe at the outlet side needs to be 3/4" lower.

Depending upon the amount of slope in your line (2% minimum is required for proper operation), you may need to replace several feet of pipe downstream from the valve to average out this "loss" of fall.

NOTE: New Straight-Fit and ML-FR4 require less slope. (refer to detail pages for these products)

Policies

Mainline Valve Warranty
(in printable Adobe Acrobat .pdf file)

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