CoralVue Clear Springless Check Valve, Slip Fit, 1-1/2"
SKU: RF-8415CS
- This clear PVC flapper check valve stops backflow in aquarium plumbing lines.
- The springless flapper opens with low pressure, so it works on dosing and ATO lines.
- The clear body lets you see flow and spot blockages without removing the valve.
- 1-1/2" size; other sizes are also available
CoralVue
CoralVue's house brand covers the essentials, from salinity calibration fluids and wire management boards to fish shipping bags and frag supplies.
1-1/2" Clear Check Valve (No Spring Flapper) for Aquarium Plumbing
The Clear Check Valve is a one-way slip-fit valve built for freshwater and marine plumbing. It uses a hinged plastic flap instead of a spring. Water pushes the flap open when flowing in the right direction. When flow stops or tries to reverse, the flap closes. This keeps water from siphoning back through your lines and protects your equipment.
The clear PVC body is one of the most practical details. You can see exactly what is happening inside the valve at a glance. If debris is blocking the flap or flow looks wrong, you know immediately. You do not need to remove the valve or guess.
Key Features:
- One-way flapper design allows flow in a single direction and closes automatically on reverse pressure
- No spring means lower cracking pressure, making it suitable for low-flow applications like dosing pumps and ATO lines
- Clear PVC body provides a direct view of flow status and internal condition without disassembly
- Slip-fit connections on both ends for standard PVC solvent cement installation
- Rated for both freshwater and saltwater (marine) use
Ideal For:
- Dosing pump output lines where backflow could contaminate a reagent reservoir
- ATO (auto top-off) pump lines to prevent siphoning back into a freshwater reservoir
- Return pump plumbing where back-siphon could drain the display tank during a power outage
- Airline tubing on air pumps to stop tank water from flowing back into the pump body
- Any low-pressure aquarium plumbing run where a spring-loaded valve would restrict flow too much
- Hobbyists building or replumbing a sump system who need reliable one-way flow control
Pro Tips:
- Install it in the correct orientation. A springless flapper relies on gravity and back-pressure to close. Mount it so the natural flow direction is horizontal or slightly upward. A vertical downward installation may not close reliably when flow stops.
- Inspect it regularly on dosing lines. Calcium and salt creep can coat the flap over time and prevent a full seal. Pull the valve out every few months, rinse it with fresh RO water, and check that the flap moves freely.
- Size to your pipe, not your pump. Use the same diameter as the rest of your plumbing run. Reducing down to a smaller valve adds unnecessary restriction and can create a pressure choke point, especially on return lines.
What's Included:
1x Clear slip-fit flapper check valve (no spring) in 1-1/2" size
Specifications:
- Type: Springless flapper check valve
- Body Material: Clear PVC
- Connection Type: Slip fit (solvent weld)
- Spring: None
- Compatibility: Freshwater and marine (saltwater) aquarium plumbing
WARRANTY
CoralVue, Inc. hereby guarantees this product to be free from defects in material and workmanship for a period of:
- One (1) year warranty on the device body/housing
- One (1) year warranty on dosing pump motor (not dosing head(s))
- Tubing, head rollers, and head bushings are considered wearable parts because they experience regular friction, pressure, and use over time, leading to natural degradation. Since these components are expected to wear out during normal operation, they are not covered under the limited warranty.
Warranty is activated on the date of purchase.
This Standard Limited Warranty applies and is limited as follows:
- To the product only as long as it remains in the possession of the original purchaser.
- To the product that has not been subject to accident, misuse, or abuse.
- To the product that has not been modified, altered, defaced, or had repairs made or attempted by other than CoralVue, Inc.
- That CoralVue be immediately notified in writing within ten (10) days of the owner's or his agent's first knowledge of the defect.
- That CoralVue, Inc. shall be given the first opportunity to make any repairs, replacements, or corrections to the defective construction within a reasonable period of time.
- Under no circumstances shall CoralVue and/or the Manufacturer be liable by virtue of this warranty or otherwise for damage to any person or property whatsoever for any special, indirect, secondary, or consequential damages of any nature, however arising out of the use or inability to use because of the product defect.