Quick answer: A pool heater pressure relief valve protects the heat exchanger from an over-pressure rupture, not from a lack of water flow — that’s the pressure switch’s job, covered in our pressure switch guide. For Raypak Digital heaters (R266A, R336A, R406A) the OEM kit is 007224F (125 PSI, roughly $169); Pentair MasterTemp, MasterTemp 125, and Sta-Rite Max-E-Therm use the 473715Z (50 PSI, roughly $165-$180); Hayward H100iD/iDP1 and H150-H250 Millivolt units take the CHXRLV1930 (75 PSI, roughly $80-$105); and Zodiac/Jandy JXi 200/260/400 heaters use the R0336101 kit (roughly $154, PSI not published by any retailer we checked). One genuine surprise while researching this: neither Pentair’s UltraTemp nor Hayward’s HeatPro heat pump appears to use a water-side relief valve the way their gas siblings do.
A pressure relief valve is one of the few safety-critical parts on a pool heater that most owners never think about until it’s weeping — and weeping doesn’t always mean the valve itself has failed. We’ve matched each brand’s current OEM part below, and flagged the one genuinely unresolved spec we couldn’t confirm from any manufacturer or retailer source.
Pool heater pressure relief valves at a glance
| Relief valve | Fits | PSI rating | Price |
|---|---|---|---|
| Raypak 007224F | Digital R266A, R336A, R406A | 125 PSI | ~$169 |
| Pentair 473715Z | MasterTemp, MasterTemp 125, Max-E-Therm | 50 PSI | $165-$180 |
| Hayward CHXRLV1930 | H100iD/iDP1, H150-H250 Millivolt | 75 PSI | $80-$105 |
| Zodiac/Jandy R0336101 | JXi 200/260/400 | Not published | ~$154 |
1. Raypak 007224F — For Digital R266A, R336A & R406A
Raypak 007224F Pressure Relief Valve Kit
- The current OEM relief-valve kit for Raypak's Digital line, the same heaters covered in our best Raypak pool heater roundup.
- Raypak's smaller R206A atmospheric model uses a different part, the 008091F, also rated 125 PSI and priced closer to $121 — confirm your exact model number before ordering.
- Owners of Raypak's newer AVIA line use a separate part, the 018936F (around $210) — Raypak doesn't publish a PSI rating for that specific kit on any retailer listing we checked, so confirm the spec plate on the heater itself rather than assuming it matches the Digital line's 125 PSI.
- Threads onto the water side of the manifold; no gas-line work involved.
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2. Pentair 473715Z — For MasterTemp & Max-E-Therm
Pentair 473715Z Pressure Relief Valve
- Rated at 50 PSI, notably lower than the 75-125 PSI ratings on the other three brands' gas-heater relief valves — that's a genuine spec difference by design, not an error, so don't substitute a higher-PSI valve from another brand.
- The same shared electronics platform that covers Sta-Rite's rebadged Max-E-Therm line (see our control board guide for the same Pentair/Sta-Rite overlap) extends to this part too.
- We could not confirm a standalone OEM relief valve part for Pentair's UltraTemp heat pump line — if you own an UltraTemp and a technician quotes this part, ask specifically which component they mean before paying for it.
3. Hayward CHXRLV1930 — For H100iD/iDP1 & H150-H250 Millivolt
Hayward CHXRLV1930 Pressure Relief Valve
- Covers a wide range of Hayward's H-Series gas heaters, from the smaller H100iD/iDP1 models through the H150-H250 Millivolt line and several older CZ/HM2/CPS/PSG/SG-series units.
- Retailer pricing spans roughly $80-$105; watch for outlier listings well under $60, which are more likely discount or partial-kit sales than a genuine price point.
- Hayward's HeatPro heat pump does not use this part — it relies on a separate refrigerant-circuit "hot gas bypass valve" instead of a water-side pressure relief valve, since a heat pump's exchanger doesn't face the same direct-fired over-pressure risk. Don't order this valve for a HeatPro unit.
4. Zodiac/Jandy R0336101 — For JXi 200/260/400
Zodiac/Jandy R0336101 Pressure Relief Valve Kit
- No retailer or manufacturer listing we checked publishes a PSI rating for this specific kit — confirm the number stamped on your heater's rating plate rather than assuming it matches another brand's 75-125 PSI range.
- Jandy's older Legacy platform (LRZE, LRZM, LXi Low NOx, LX/LT Low NOx) splits into two different relief valves depending on the heater's header material: a polymer version (R0336100, 75 PSI, $59-$99) and a bronze/cast-iron version (R0040400, 75 PSI, $76-$140) for the oil-fired XL-3 and older Hi-E2/Lite2 models. That's a genuinely different pattern from the other three brands here, which each use one relief valve per current platform.
- Zodiac's own installation copy for this kit states the valve is recommended on every installation and mandatory anywhere water flow downstream of the heater could be restricted — worth keeping in mind if you're troubleshooting a weeping valve rather than replacing a missing one.
Weeping valve? Check for a flow restriction first
A relief valve that drips isn’t always a failed part. Zodiac’s own documentation ties the valve’s job directly to downstream flow restriction — it’s specifically called out as mandatory wherever flow past the heater outlet can be blocked — and pool-service troubleshooting consensus points to a stuck or “passing” check valve, or a partially closed valve elsewhere in the plumbing, as a common cause of a relief valve weeping even though the valve itself is fine. Before replacing the part, confirm every downstream valve is fully open and check whether your check valve is holding properly; a relief valve doing its job correctly under a real restriction will just weep again once the new one is installed if the underlying cause isn’t fixed.
What a fair quote looks like
The part itself runs roughly $80-$210 depending on brand and model line. We couldn’t find a pool-heater-specific published figure for a full installed replacement — general pool-equipment labor runs in the $50-$100/hr range with $125-$195 diagnostic-visit fees according to typical Angi/HomeAdvisor pool-repair data, so a reasonable estimate for the part plus a straightforward half-hour-to-hour swap lands around $150-$350 installed. Treat that as an estimate rather than a sourced industry-wide figure, and get a second quote if a technician’s number runs well above it for what should be a simple threaded-fitting job.
The bottom line
A pressure relief valve is cheap insurance against a much more expensive heat-exchanger rupture, and — unlike the control board or gas valve — it’s one of the more DIY-friendly parts on this site. Match the exact OEM part to your model (Raypak 007224F, Pentair 473715Z, Hayward CHXRLV1930, or Zodiac/Jandy R0336101), and if you own a heat pump rather than a gas heater, don’t assume you need this part at all — check with the manufacturer first, since neither UltraTemp nor HeatPro appears to use a direct water-side equivalent. If the valve is weeping rather than obviously failed, rule out a downstream flow restriction before replacing it; our pool heater not heating guide and leak repair guide cover the broader flow and leak-diagnosis checks this part fits into.
Sources: InyoPools — Raypak OEM parts listings, Sunplay — Pentair 473715Z, PoolWeb, ePoolSupply — Zodiac/Jandy relief valve kits, PST Pool Supplies, Angi — Pool Heater Repair Cost Guide