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White plastic in-line check valve with two half-inch barbed fittings

SHURflo

SHURflo In-Line Check Valve 1/2" Barbs 100 PSI 340-001

SKU CH-ZXBY-WGZRD

Allows water flow in one direction only, safeguarding against back surge up to 100 PSI with 1/2 inch barbs for easy installation

  • Prevents reverse flow with one-way valve design
  • Handles back-surge pressure up to 100 PSI
  • Compact in-line body fits tight spaces
  • 1/2-inch barbed ends for simple hose connection
  • Protects RV plumbing from pressure damage

In-Line Check Valve for RV Water Systems

This SHURflo valve installs directly into 1/2-inch barb connections to enforce single-direction water flow. It protects pumps and fixtures from back-surge pressure up to 100 PSI in recreational vehicle plumbing.

Verify Barb Size and Flow Direction Before Fitting

Confirm that your existing hose or tubing uses 1/2-inch barbed fittings so the valve seats securely. Check the arrow on the body to match the intended supply direction and ensure no downstream restriction exceeds the pressure rating.

Passive Operation With No Power Or Noise

The valve contains no moving parts that require electricity, so it adds zero electrical load and produces no audible sound during normal use. Its compact plastic housing introduces minimal flow resistance while reliably preventing reverse pressure spikes.

How it compares

Measured against everything we stock in RV Covers & Tie-Downs, at today’s prices. Recalculated every night.

Price $16.99
Cheaper than about 89% of the 9 comparable items (median $51.99).

Specifications

Product
Brand nameSHURFLO

Questions about this item

What comes with the 340-001 check valve and what must I buy separately?

The valve body with 1/2 inch barbs is supplied; tubing, clamps and any fittings to match your plumbing must be purchased separately.

How do I choose between the listed versions or capacities of the 340-001?

Only one version is listed — 1/2 inch barbs rated to 100 PSI — so select it when your hose size and pressure requirement match those figures.

What does the 100 PSI rating mean once the valve is installed in my water system?

It will block reverse flow and protect downstream components from back-surge pressures up to 100 PSI during pump shut-off or pressure spikes.

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