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Due to a high demand expect lead times of 5-7 days on special order Prier and Mansfield items.

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Canplas Backflow Preventers

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 sewer from re-entering your drainage systems. We offer PVC backwater valves in 3", 4" and 6".

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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 3925A02LOS Interceptor Grease Trap 25 GPM/50 LBS
Model #3925A02LOS
This is currently a non-stock item and will ship direct from the manufacturer in 1-2 days. Lo-PRO Canplas® is proud to introduce…
$500.00
$500.00
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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 S1580-15 1-1/2" PVC Spring Assisted Swing Check Valve, Soc x Soc
Model #S1580-15
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 S1580-20 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
$33.00
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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
$33.00
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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
$60.00
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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
$60.00
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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…
$45.00
$45.00
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Spears S475P 4" PVC SCH40 DWV Backwater Valve, Soc x Soc
Model #S475P
This item will ship the next day direct from Spears Manufacturing. Backwater Valves are designed to prevent backflow in numerous…
$51.00
$51.00
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