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Pentair Mastertemp 400K BTU Propane to Natural Gas Conversion Kit | 77707-1411

Name: Pentair Mastertemp 400K BTU Propane to Natural Gas Conversion Kit | 77707-1411
Brand: Pentair
SKU: 77707-1411
Price: 39.94 USD
Availability: InStock

The Pentair Mastertemp 400K BTU Propane to Natural Gas Conversion Kit 77707-1411 is a conversion accessory designed to let you convert a Pentair Mastertemp 400,000 BTU propane gas heater to operate on natural gas. This kit includes the necessary orifices and hardware to adapt fuel delivery so your heater can safely and efficiently run on natural gas instead of propane when installed according to manufacturer guidelines.

What This Part Is For

This conversion kit is specifically made for the Pentair Mastertemp 400,000 BTU Gas Pool & Spa Heater. Use it when you are switching fuel types from liquid propane (LP) to natural gas (NG), typically due to availability, cost, or installation requirements at your pool equipment location.

Features & Benefits

Complete conversion kit for switching a Mastertemp 400K heater from propane to natural gas
Includes jets/orifices and hardware needed for proper fuel delivery adjustment
Designed to match OEM specifications for performance and safety
Helps maintain efficient combustion and heat output when using natural gas

Installation Notes

Follow the Pentair Mastertemp service manual instructions for safe conversion
Conversion must be done by a qualified technician or licensed gas professional
Verify all seals and connections are tight and leak-free before operation

Maintenance Tips

Check gas supply fittings and regulator periodically for leaks or wear
Inspect orifices and burners for debris or corrosion
Have your heater serviced seasonally to maintain peak performance

Related Products

Pentair Mastertemp 400K BTU Gas Heater – The main heater that this conversion kit is designed to adapt.
Pentair Mastertemp Anode Kit – Replacement anode to help reduce corrosion inside your heater.
Pentair Mastertemp Gasket Kit – Full set of replacement gaskets for maintaining proper seals during maintenance.
Pentair Mastertemp Spare Parts Kit – Common wearable parts for annual service and repairs.

Questions about returns? View our return policy.

Hours Of Operation:

Monday - Friday: 7:00 am to 5:00 pm Phoenix Time

Saturday: 8:00 am to 2:00 pm

Sunday: Closed

We do not ship on Saturday or Sunday.
Orders totaling more than $300 will require signature confirmation upon delivery.
We process and prepare orders for shipment within 1 business day. Please note that many other pool supply retailers require 3–5 days of handling time before shipping.
Orders placed after 1:00 pm Phoenix Time may not be eligible for same-day shipment.
Expedited shipping options are available at checkout.

Return Policy:

Products that are received damaged will receive a refund in store credit.
Most products are eligible for return within 30 days of receipt, except where noted below.
To initiate a return, please complete an RMA form prior to sending your item back.
Original shipping costs are non-refundable and will be deducted from the return credit.
Items returned missing accessories or original packaging, or that are not in the same condition as received, may be subject to a restocking fee of up to 100% depending on the condition of the item upon return.
Some returns will be charged an automatic 15% restocking fee.
We are unable to issue refunds for items that have been damaged or rendered inoperable due to installer error.
Please complete the return form to receive your RMA number and return shipping label.
Chemical products are not eligible for return under any circumstances.
The Pentair Colorsync 618031 is not eligible for return.
Pool cleaners are not eligible for return.
Opened seals and o-rings are not eligible for return.
Capacitors are not eligible for return.
Plastic popup tools are not eligible for return.
Automation components and circuit boards are not eligible for return.
If a light is returned due to a reported malfunction and is found to be fully operational upon testing, return shipping costs and a restocking fee will be deducted from the refund.
Orders refused at the time of delivery will be subject to the original shipping costs being deducted from the refund.