Hayward H-Series Heater Natural Gas Valve 150-400 MV | HAXGSV0001
Hayward Products
SKU: HAXGSV0001
Hayward HAXGSV0001 Millivolt Natural Gas Valve (MV) — H-Series 150–400 (ED1 Style)
The Hayward HAXGSV0001 is a genuine OEM millivolt (MV) natural gas valve used on select Hayward H-Series pool heaters. This valve regulates the flow of natural gas to the burner system. It is the correct style for millivolt heaters (powered by a thermopile/thermal generator), not electronic dual-stage systems.
Fits / Compatibility
- Hayward H-Series Millivolt (MV) heaters in the 150,000–400,000 BTU range
- Commonly listed for ED1-style heater models, including: H150ED1, H200ED1, H250ED1, H300ED1, H350ED1, H400ED1
Fit tip: Confirm your heater is a millivolt (MV) model and uses natural gas (not propane). Gas valves are not interchangeable between fuel types or between MV vs electronic/dual-stage heater configurations.
What It Does
- Controls and regulates natural gas flow to the burner system
- Works with the heater’s millivolt safety circuit (thermopile-powered systems)
- Helps maintain stable heater operation when the correct gas supply and manifold settings are present
Common Reasons to Replace
- Heater will not light or will not stay running after troubleshooting confirms proper water flow and ignition components
- Intermittent shutdowns linked to a failing valve (after verifying thermopile output and wiring integrity)
- Gas valve is leaking, sticking, or has damaged terminals/valve body
- Valve failure discovered during heater service or refurbishment
What’s Included
- 1 OEM HAXGSV0001 millivolt natural gas valve
Important Installation Notes
- Gas components should be serviced by a qualified technician.
- After installation, the system must be leak tested and verified for correct operation.
- Confirm proper gas supply type (Natural Gas), inlet pressure, and heater model compatibility before ordering.
- If a new valve doesn’t resolve ignition issues, verify the thermopile output, safety switches, wiring, and gas supply before further parts replacement.
Related Products
- Hayward HAXGSV0001 Gas Valve (search)
- Hayward H-Series Thermopiles / Generators (search)
- Hayward H-Series Pilot & Ignition Parts (search)
- Hayward HAXPSA1930 Pressure Switch Assembly (search)
- Hayward H-Series Heater Parts (search)
Maintenance Tips
- Keep the heater area clear for proper airflow and safe operation.
- Maintain proper water flow (clean filter and baskets) to avoid nuisance shutdowns that can look like a gas/ignition problem.
- If ignition becomes inconsistent, verify gas supply, thermopile output, and safety switch operation before replacing major components.
- Maintain balanced water chemistry to reduce scaling inside the heater and extend overall heater life.
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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