Dual Check Valve | 50 PSI | 3/8" or 1/4"
SKU: EA-WF-REV-11
Order before 12:00pm AEST
for same-day dispatch from Wyong NSW
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Australia-wide delivery. Shipping is calculated at checkout based on the packed weight and delivery destination.
Free Click & Collect from our Wyong NSW showroom.
Same-day dispatch on orders before 12pm AEST.
In stock · ships from Wyong, NSW
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Questions? Call (02) 8772 8162 Mon-Thu 9am-3pm · Fri 9am-1pm AEST · Closed weekends
- Pressure limit
- 50 PSI
- Function
- Dual check + regulator
- Sizes
- 3/8" OD or 1/4" OD
- Material
- Plastic
Specifications
- Type
- Dual check valve with pressure limiting
- Pressure limit
- 50 PSI
- Available sizes
- 3/8" OD or 1/4" OD
- Material
- High-quality plastic
- Function 1
- Backflow prevention - prevents reverse flow
- Function 2
- Pressure limiting - caps downstream pressure at 50 PSI
- Connection
- Quick-connect push-fit
- Installation note
- Flow direction marked on body - install per arrow
- Applications
- RO system inlets, pre-filter circuits, fridge water lines, under-sink filters
A 50 PSI dual check valve with quick-connect fitting - a small but critical safety component for RO and water filtration systems. Provides two protective functions in one body: backflow prevention and pressure limiting.
Two Critical Protections
Backflow prevention stops water from flowing back through the system in reverse. Why this matters:
- Pressure changes in mains supply can momentarily reverse flow direction
- Backflow can pull contaminants from one side of the system into the cleaner side
- For drinking-water systems, backflow events are a regulatory and health concern
Pressure limiting caps the pressure reaching downstream components at 50 PSI:
- Protects RO membranes and housings from pressure spikes
- Prevents damage to cartridge housings rated for 60-80 PSI continuous duty
- Reduces the risk of fitting blowouts and tube failures during pressure transients
A single component delivers both protections - substantially cheaper than installing separate check valves and pressure regulators.
Where This Valve Goes
- RO system inlet - protects the full system from over-pressure and backflow
- Pre-filter circuit - sits between mains supply and filter cartridges
- Fridge water line - protects icemaker and dispenser components
- Under-sink filter installations with sensitive downstream components
Two Size Options
- 3/8" OD - for commercial RO and high-flow installations
- 1/4" OD - for residential RO and fridge filter installations
Select the size matching your tubing format. Mixing sizes (1/4" tubing into a 3/8" valve, or vice versa) won't work without additional reducer fittings.
Build
- Material: high-quality plastic, durable and corrosion-resistant
- Pressure limit: 50 PSI
- Function: dual check valve + pressure regulation
- Connection: quick-connect push-fit
- Application: residential RO, commercial RO, water filter installations
Installation
Quick-connect push-fit on both ends:
- Cut tube square on both sides
- Push tube into the inlet port (note flow direction marking on the valve body)
- Push tube into the outlet port
- Pull gently to confirm both connections
Flow direction matters - check valves only work in one direction. Install with the arrow on the body pointing in the direction of normal flow.
Key features
- 50 PSI dual check valve with quick-connect fitting
- Dual function: backflow prevention + pressure limiting
- Available in 3/8" OD or 1/4" OD connections
- High-quality plastic, corrosion-resistant
- Protects RO membranes and filter cartridges from pressure spikes
- Quick-connect push-fit installation
- Suits residential and commercial water filter setups
Recommended for
- RO system inlet protection
- Fridge water line backflow prevention
- Under-sink filter installations with sensitive components
- Sites with variable mains pressure (rural, end-of-line, older infrastructure)
- Replacement of failed or aged check valves
Ready to order?
Order before 12:00pm AEST on a business day for same-day dispatch from Wyong NSW. See shipping details.
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Australian-owned
Real Wyong NSW warehouse and showroom, with local product support.
Compatibility made clear
Connections, dimensions, finishes and installation requirements are listed before purchase.
Compliance details
WaterMark and WELS information is shown where it applies to the specific product.
Dual Check Valve | 50 PSI | 3/8" or 1/4"
$34.95 AUD