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Canplas Backwater Valves

Protect your building and its contents with a clean check backwater valve from Complete Plumbing Source. A PVC sewer backflow preventer is designed to prevent fluids from re-entering drainage systems. We offer PVC backwater valves in 3"", 4"", and 6"" and general flood-guards in 2"", 3"", and 4"".

The sewer backflow preventer selection we have offers an economical solution to reduce the possibility of flooding and sewer backups. Many building codes require these backwater valves, but it is in a homeowner or building owner’s best interest to install or replace these in order to protect from backwater.

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Front view
Canplas 123283-2A Replacement Flapper for 3" Plastic Backwater Valve
Model #123283-2A
Note: We currently do not stock this item, please add 3-5 days for delivery.
$11.00
$10.00
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Canplas 123283-3A Replacement Cleanout Lid for 3" ABS Backwater Valve
Model #123283-3A
Note: We currently do not stock this item, please add 1-2 days for delivery.
$9.20
$9.20
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Canplas 3920AX6 6" Riser for 15-20-15 GPM Grease Traps
Model #3920AX6
This is currently a non-stock item and will ship direct from the manufacturer in 1-2 days.
$225.00
$225.00
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Canplas Endura 3925A03 Interceptor Grease Trap 25 GPM
Model #3925A03
This is currently a non-stock item and will ship direct from the manufacturer in 1-2 days. Based on the same dimensional footprint as our…
$392.00
$400.00
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Spears S1580-20 2" PVC Spring Assisted Swing Check Valve, Soc x Soc
Model #S1580-20
Notes:  This item will ship the next day direct from Spears Manufacturing. Warnings:  Service pressure maximum is 140 degrees…
$29.00
$29.00
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Spears S1580-20F 2" Threaded PVC Spring Assisted Swing Check Valve, FIP x FIP
Model #S1580-20F
Notes:  This item will ship the next day direct from Spears Manufacturing. Warnings:  Service pressure maximum is 140 degrees…
$29.00
$29.00
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Spears S1580-30 3" PVC Spring Assisted Swing Check Valve, Soc x Soc
Model #S1580-30
Notes: This item will ship the next day direct from Spears Manufacturing. Warnings: Service pressure maximum is 140 degrees…
$54.00
$54.00
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Image is for reference only
Spears S1580-30F 3" Threaded PVC Spring Assisted Swing Check Valve, FIP x FIP
Model #S1580-30F
Notes:  This item will ship the next day direct from Spears Manufacturing. Warnings:  Service pressure maximum is 140 degrees…
$54.00
$54.00
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Spears S375P 3" PVC SCH40 DWV Backwater Valve, Soc x Soc
Model #S375P
This item will ship the next day direct from Spears Manufacturing. Backwater Valves are designed to prevent backflow in numerous…
$35.00
$39.00
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Canplas 3" PVC SCH40 DWV Backwater Valve with 16" Riser Sleeve and Cap
Model #13715
Canplas Backwater Valves have been used to protect buildings and their contents since 1974.  Hundreds of thousands of successful…
$36.40
$36.40
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Canplas 4" PVC SCH40 DWV Backwater Valve
Model #13708
Warnings: Prior to testing or commissioning this system, remove the clean-out lid and check the flapper lid for freedom of movement. Used…
$33.00
$33.00
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Canplas 223285W 4" PVC SCH40 DWV Backwater Valve with 16" Riser Sleeve and Cap
Model #13718
Protecting residential and commercial plumbing from the dangers that are associated with back flow and contaminated water is essential, and…
$44.85
$45.00
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