The Pentair Combination Gas Control Valve Kit (42001-0051S) is a genuine OEM replacement designed to manage gas flow, pressure regulation, and safety shutoff functions in Pentair pool heaters such as MasterTemp and Max-E-Therm models. This critical control valve assembly ensures proper gas delivery to the heater’s burner system while maintaining safety and compliance with operational standards.

Crafted to exact Pentair specifications, this replacement valve kit delivers reliable performance, smooth ignition operation, consistent temperature management, and built-in safety cutoffs to protect your heating system and your pool environment.

Pentair Combination Gas Control Valve Kit (42001-0051S) Compatibility

• Replacement part for Pentair MasterTemp® pool heaters

• Also compatible with Pentair Max-E-Therm® pool heater models

• Fits natural gas and propane versions where specified by Pentair

• Works with standard pool heater gas manifolds and burner assemblies

Key Features

• Genuine Pentair part, supplied under manufacturer part number 42001-0051S.
• Sized by BTU output — match the rating and fuel type to your existing unit.
• Ships from our US warehouse with tracking on dispatch.

Specifications

• Brand: Pentair
• Manufacturer part number: 42001-0051S
• Category: Pool Heaters
• Condition: New
• UPC / GTIN: 022315210561
• Shipping weight: 2.5 lb

Frequently Asked Questions

Is the 42001-0051S a genuine Pentair part?

Yes. The 42001-0051S is a Pentair part supplied under that manufacturer part number. It is not a generic substitute.

Does the BTU rating have to match my old heater?

The BTU rating should match or exceed your previous heater. Undersizing means the pool never reaches temperature on cold days; oversizing costs more up front but heats faster and cycles less.

Can this run on propane instead of natural gas?

No. Gas pool heaters are built for one fuel and require a manufacturer conversion kit to change. Check the data plate on your existing unit and order the matching fuel type.

What size heater do I need for my pool?

A common rule is 1 BTU per gallon as a minimum, increased for windy sites, uncovered pools, or cold climates. A 20,000 gallon pool typically starts at 250,000 BTU.

Do I need a professional to install a pool heater?

Gas heaters involve gas line sizing, venting and electrical connections, and most jurisdictions require a licensed installer plus a permit. Improper installation voids the manufacturer warranty.

How do I confirm this part fits my equipment?

Check the part number stamped on the component you are replacing, or find it on the parts schematic in your owner's manual. If the number differs or is unreadable, send us your equipment model and serial number and we will verify fitment before you order.

How quickly does this ship?

In-stock items ship from our US warehouse on business days. You will receive tracking by email once the order leaves the warehouse.

Can I return it if I ordered the wrong part?

Unopened, uninstalled items can be returned within 30 days. Equipment that has been installed or plumbed cannot be returned, so confirm fitment before installation.

Is this covered by a warranty?

Manufacturer warranty terms vary by brand and product. Warranty claims generally require proof of purchase and, on installed equipment, evidence of professional installation.