90mm Metric Check Valve
SKU: PVC-CHKVLV-90
- Backflow Protection: Instantly stops water from siphoning back into the sump during power outages or pump maintenance.
- Commercial Sizing: Specifically sized for 90mm metric PVC pipe (approx. 3.5" OD), the standard for massive commercial Reef Octopus filtration systems.
- High-Pressure Rating: Industrial-grade construction rated for pressures up to 16 bar (232 psi).
- Low Opening Pressure: Engineered to open with minimal resistance (~0.17 psi), maximizing the efficiency of high-flow commercial pumps.
- Saltwater Tough: Constructed from high-impact grey PVC-U with EPDM seals for total corrosion resistance.
- Ideal For: Commercial protein skimmers; high-volume display return lines; industrial aquaculture manifolds.
90mm Metric Check Valve
The 90mm Metric Check Valve (Non-Return Valve) is a high-capacity safety component engineered for professional aquarium and industrial aquaculture installations. Precision-sized for 90mm Metric PVC pipe, this valve is a critical component in large-scale filtration, frequently utilized on the output and recirculating lines of massive industrial Reef Octopus commercial skimmers.
In large-scale life support systems, the volume of water held in return plumbing can be immense. This check valve acts as a fail-safe, instantly stopping water from siphoning back into the sump if a pump fails or power is lost. This prevents sump overflows and ensures that your life support systems remain primed for an immediate, quiet restart once power is restored. Constructed from industrial-grade grey UPVC with an EPDM seal, it provides superior chemical resistance and longevity in both marine and freshwater environments.
Key Features
True Metric Calibration: Fits 90mm OD metric pipe—essential for maintaining factory Reef Octopus commercial equipment.
Extreme Flow Capacity: Designed with a smooth internal bore to ensure minimal restriction for high-performance pumps.
Commercial Grade Durability: Designed for high-pressure systems up to 232 psi, far exceeding standard residential plumbing limits.
Corrosion Resistant: 100% saltwater safe and chemically inert; will not rust or degrade in harsh reef conditions.
Socket-Style Connection: Slip x Slip configuration ensures a massive surface area for a secure, permanent solvent weld.
Ideal For
Commercial Return Manifolds: The primary safety device for massive display tanks and public exhibits.
Industrial Skimmer Assemblies: Protecting large-body Reef Octopus commercial skimmers from drainage during maintenance.
Aquaculture Facilities: Managing one-way flow in complex multi-pump life support systems.
Images shown are representative of the product family. Materials, sizes, and configurations may vary.
What’s Included:
(1) 90mm Metric PVC Check Valve
Specifications:
Size: 90mm
Connection Type: Slip x Slip (Socket)
Body Material: High-grade UPVC
Seal Material: EPDM
Pressure Rating: 0.012 – 16 bar (0.17 – 232 psi)
Compatibility: 90mm Metric Pipe ONLY
- Locate the flow direction arrow on the valve body; it must point toward the aquarium or intended direction of flow.
- Ensure the 90mm metric pipe is cut perfectly square and thoroughly deburred to prevent damage to the EPDM seals.
- Perform a dry-fit of the valve in your plumbing run to ensure it is accessible for periodic inspection.
- Apply PVC primer and a heavy-duty solvent cement to both the pipe end and the valve socket.
- Insert the pipe firmly and hold for 60 seconds to ensure a secure, permanent bond.
Pro Tips:
- For the most reliable seal, install the valve in a vertical position (upward flow) so gravity assists the internal sealing mechanism.
- Metric vs. Standard 3-Inch. A 90mm metric valve will not fit standard 3-inch or 4-inch USA pipe. 90mm is a specific metric outer diameter (approximately 3.54 inches). US 3-inch pipe is 3.5 inches OD, while US 4-inch pipe is 4.5 inches OD. Always measure your pipe with a caliper before applying adhesive.
- Maintenance Schedule. In large-scale marine environments, calcium carbonate or small organisms can prevent a check valve from sealing perfectly. We recommend inspecting the valve every 6 months to ensure the internal mechanism and EPDM seal are free of obstructions.
- Industrial Aesthetic. Use clear PVC primer instead of purple to maintain the professional, factory look of the grey UPVC. This matches the professional aesthetic of high-end commercial Reef Octopus systems for a clean, industrial-grade installation.