H2Flow FlowVis FV-2 2" Flow Meter with Built-In Check Valve The H2Flow FlowVis FV-2 is an inline flow meter designed for 2" Schedule 40 pool and spa plumbing. It combines a clear, easy-to-read GPM (gallons-per-minute) scale with a built-in check valve, letting you measure real system flow while also preventing reverse flow in the return line. Key Features Integrated flow meter and check valve in one compact body. Designed for 2" PVC Schedule 40 pipe installations. Direct GPM scale for quick, accurate flow verification. Clear housing allows visual confirmation of flapper/check operation and water movement. Helps optimize pump speed settings, heater/salt-system flow requirements, and overall efficiency. Technical Specifications Model / Part Number: FV-2 Pipe Size: 2" Schedule 40 Flow Scale: GPM (gallons per minute) Valve Type: Inline check valve with flow measurement Application: Pool/spa return plumbing, equipment pad flow verification Installation & Compatibility Notes Install the FV-2 in-line on a straight section of 2" return plumbing after the filter (and typically after the heater) where consistent flow measurement is desired. Follow the flow-direction arrow on the body to ensure correct check-valve operation. Use proper PVC primer and cement, and allow full cure time before pressurizing. Once running, read the GPM indicator with the pump operating at the intended speed. Maintenance Tips Periodically inspect the clear body for debris buildup that could affect the check flapper or the flow reading. If flow readings drift, verify there are no upstream restrictions (dirty filter, closed valves, clogged baskets). During seasonal service, confirm the check valve opens smoothly and closes fully when the pump stops. Winterize by draining the line as you would any inline fitting to prevent freeze damage. Why Choose the FV-2? The FV-2 is a practical upgrade for anyone who wants true system flow data without adding extra fittings. It makes dialing in variable-speed pumps easier, protects equipment that needs minimum flow, and adds a reliable check valve in the same spot—saving space and simplifying plumbing.
