Stenner Pumps MCDBINJ injection duckbill check valve with 1/4 in. ferruleStenner Pumps MCDBINJ Injection Duckbill Check Valve with 1/4" Ferrule, 5 Pack In stock$4099
Stenner Pumps MCDBINJ injection duckbill check valve with 1/4 in. ferrule
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Stenner Pumps MCDBINJ Injection Duckbill Check Valve with 1/4" Ferrule, 5 Pack

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$4099
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Quick overview

  • Five to a pack Sold as a 5 pack, which suits a service route or a pump you rebuild on a schedule.
  • Santoprene duckbill The flexible duckbill is what stops treated water pushing back up the injection line.
  • Quarter inch ferrule Built with a 1/4 in. ferrule for the injection fitting.
  • Two compatibility readings The product name lists 45, 85, 100 and 170 Series adjustable and fixed pumps plus SVP and BDF Series, while the short title says Classic and Econ pumps.
  • Modular by design Stenner pumps are built to have their wet end parts swapped out rather than repaired.
  • A wear part A duckbill that has hardened or split lets the line siphon back and the feed rate goes wrong.
Full description and specifications ↓

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Product details

The Stenner Pumps MCDBINJ is the injection duckbill check valve with a 1/4 in. ferrule, molded in Santoprene and supplied five to a pack.

What it does

The duckbill sits at the injection point and opens only under pressure from the pump. Between strokes it closes, which is what stops treated water from pushing back up the feed line. When the duckbill hardens, splits or takes a set, that one way behavior is lost, and the pump stops delivering the dose it is set for even though it is still running.

Compatibility, as the source has it

The data carries two readings and both are worth checking against your pump. The full product name lists the 45, 85, 100 and 170 Series adjustable and fixed pumps together with the SVP and BDF Series, while the shorter title says Classic and Econ pumps. Confirm MCDBINJ against your own parts list rather than going by pump family alone.

Why a five pack

Stenner wet ends are modular, and the small elastomeric parts are the ones that wear. Buying the check valve in fives suits anyone servicing several feeders or rebuilding a pump on a set interval.

Specifications
Brand Stenner Pumps
Manufacturer part number MCDBINJ
UPC 840034722857
Type Injection duckbill check valve
Material Santoprene
Ferrule size 1/4"
Sold as 5 per pack
Fits (product name) 45, 85, 100 and 170 Series adjustable and fixed pumps, SVP and BDF Series pumps
Fits (short title) Classic and Econ pumps
Shipping weight 0.06 lb
Ships Parcel

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Questions and answers

What people ask about this product, answered by our pool techs.

Which Stenner pumps does this fit?
The source data gives two readings. The full product name lists the 45, 85, 100 and 170 Series adjustable and fixed pumps plus the SVP and BDF Series, while the short title says Classic and Econ pumps. Match part number MCDBINJ against your pump parts list before ordering.
How many come in a pack?
Five.
What is the ferrule size?
1/4 in.
Why does the duckbill need replacing?
Santoprene hardens and takes a set over time. Once the duckbill will not close cleanly, treated water can push back up the injection line and the pump no longer delivers the dose you set.
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