Pentair ETi 250 High-Efficiency Pool and Spa Heater | 461112

SKU: 461112

Pentair ETi 250 High-Efficiency Pool and Spa Heater | 461112

SKU: 461112
Regular price
  • Low stock - 1 item left
  • Inventory on the way
  • 250,000 BTU
  • Add to Cart to Unlock Special Discounts and Savings
  • Item Qualifies For Free Gift At Checkout
  • Item Qualifies For Free Shipping in the USA
Shipping calculated at checkout.



Pentair ETi 250 High-Efficiency Pool and Spa Heater (461112)

Efficiently heat up your pool for comfortable temperatures year-round with the ETi 250. With quick heat-up times and the durable TitanTough Direct-Fire Titanium, the toughest heat exchanger material, effectively warm up your pool. A great replacement for the MasterTemp High-Performance Heater, with the same plumbing alignments to effectively serve your backyard oasis needs. Say goodbye to those after-pool shivers and hello to a cozy and warm backyard spa.

Key features and benefits:

  • Up to 96% thermal efficiency*. For every $1 of natural gas that’s piped into the heater, up to 96 cents go directly to heating your pool, ensuring optimal heating.
  • The TitanTough™ Direct-Fire Titanium Heat Exchanger is resistant to corrosion and is the toughest heat exchanger ever built—for years of high-quality, trustworthy warmth.
  • A variety of installation features, including multiple orientation options for gas line connection and easy-access keypad positioning.
  • The ETi 250 is 250,000 BTUs (BTU is the quantity of heat needed to raise one pound of water by one degree Fahrenheit). The higher the BTUs, the higher the heating power, and the faster your pool can heat up.

*The ETi 400 is 96% efficient. The ETi 250 is 94% efficient when operated on natural gas and 96% efficient when operated on propane with the available conversion kit. 


Size of the heater. Pool heaters and heat pumps are sized based on their heating capacity, measured in British Thermal Units (BTUs). A BTU is a measure of how much energy is required to heat 1 gallon of water by 1F. Most heat pumps can deliver between 100,000 – 150,000 BTUs depending on their size and most gas pool heaters are sized between 175,000 – 400,000 BTUs.

Geographic location, availability of gas, and electricity costs in your pool location are all factors in selecting a pool heater or heat pump. In general, heat pumps thrive in areas with mild to warm climates where electricity costs and low to moderate. Gas heaters aren’t heavily impacted by environmental conditions and can be a great option in cooler climates where gas prices are low to moderate.

Size and features of your pool. The size of your pool may dictate which system you need. We recommend working with your pool professional to identify the right pool heater for your backyard oasis. The ETi 250 is an ideal drop-in replacement for MasterTemp and Max-E-Therm heaters, thanks to its identical plumbing alignment.

ALL SHIPPING IN THE USA IS FREE - Some restrictions apply

· Most Orders Ship Free "Standard" To USA Domestic Mailing Addresses.

· We proudly ship with FedEx, USPS, UPS, and OnTrac. ***

· Certain items may be upgraded for shipping…ON US!

· Orders above $300 could be required to have signature confirmation

· All Pool Pumps and Pool Vacuums WILL require a signature upon delivery

· Some Expedited Shipping will incur additional handling time if Pre-Order status is displayed ****

***Shipping Carrier is determined upon delivery speed needed for each order. Paid Expedited Shipping will be shipped at the speed requested but Carriers are subject to change without notice.

**** Handling time varies with inventory and availability. Please reach out with any questions or concerns regarding the inventory of your item.


USPS First Class Mail and Priority Mail shipping is NOT GUARANTEED. Displayed transit times are estimates and not Guarantees.

Expedited Shipping via FedEx/UPS: Monday-Friday before 1:00 PM Arizona Time

We do NOT allow changes in address with Carriers after items are shipped.


Weekend deliveries are the future, and we are striving to meet all the needs of our customers. However, the carriers are attempting on rolling the processes on certain zip codes throughout the mainland 48 states only. Restrictions do apply.

Standard and expedited shipping methods through all carriers cannot guarantee Saturday deliveries due to restrictions to certain carrier zoning.


From our customers


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Los Angeles, CA

Incredible prices & free shipping for name brand products, not cheap knock offs! I placed my order on Sunday and received shipping confirmation on Monday! Filters arrived in the original Pentair Shipping carton the next day. Excellent company and service while saving big over the local pool store and cheap knockoff from large online retailer!

Google Review

Outstanding support! Customer service has prompt responses and solutions to your pool needs. I am very happy with a replacement suction vacuum solution that was suggested. I bought it and it shipped to my home in 3 days. Great job and a pleasure doing business with this pool company.

Google Review

Outstanding customer service along with very competitive prices. My orders always ship the same day as placed. Almost everything I look for happens to be in stock. Highly recommend.

Google Review

These guys are hands down THE in stock brand name products! They dont try to sell u stuff you dont need, good honest people!! I have ordered from them multiple times. Lighting fast shipping. AAA+++

Google Review

frankly, if i had the option of 10 stars i would give them....

-Google Review-
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