H2Flow FlowVis 2" Flow Meter | FV-2
H2flow
SKU: FV-2
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.
Questions about returns? View our return policy.
Hours Of Operation:
Monday - Friday: 8:00 am to 4:00 pm Phoenix Time
Saturday and Sunday: Closed
- Orders costing more than $300 WILL be required to have signature confirmation upon delivery.
- Handling time is typically only 1 day.
- Any item ordered after 1pm Phoenix time, may not ship same-day.
- Call us if you require expedited shipping and we can give you quotes based on your needs.
Return Policy:
- All products, except as noted below, are eligible for return up to 30 days after receipt of item.
- For returns, an RMA form must be filled out HERE or customers can call for additional help.
- Shipping costs will be deducted from all returned items.
- Any item that is missing accessories, original packaging, or is not returned in the same condition that it was received in, may be subject to a re-stocking fee up to 100% based on the condition we receive it in.
- Items broken, damaged, or inoperable due to installer error will not be refunded.
- Fill out the return form or give us a call to obtain an RMA and return shipping label.
- There are no returns on the Pentair Colorsync 618031
- No returns on pool cleaners.
- No returns on opened seals and o-rings.
- No returns on capacitors.
- If a light is returned because it "doesn't work" and it tests fine, the cost to ship and a re-stocking fee will be deducted from the refund.
- All products denied upon arrival at customers house WILL be charged the cost to ship.
- Visa Gift Card Promotions: Gift cards are sent within 14 days of the order. When accepting the Visa Gift card, you agree that if your order is returned or refunded, this amount will be deducted from the refunded amount. All Visa Gift cards are sent via email in an E-Gift Card format and are non refundable.
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