★★★★★ 5
Fits and does the job.
Style: BE-177P 1-Pack
Fits and does the job. I feel the difference.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 30, 2026
Heat Exchanger, Pentair MasterTemp/Max-E-Therm 400, Nat./LP
Marsoni
M251S
Get it in 3 business days with 1 day shipping.
Friday, May 29
Heat Exchanger, Pentair MasterTemp/Max-E-Therm 400, Nat./LP77707 0234 Heat Exchanger, Pentair MasterTemp Max E Therm 400, Nat. LP This tube sheet coil assembly kit is designed to use with Pentair MasterTemp pool and spa heater models 400NA, 400LP and also compatible with Pentair Sta Rite Max E Therm pool and spa heater model 400. It includes 400k BTU coil, silicone, o rings.
Quick Dispatch:
Your Heat Exchanger, Pentair MasterTemp/Max-E-Therm 400, Nat./LP orders ship within 1-2 business days.
Delivery Options:
- Standard: 3-7 business days
- Fast: 2-3 business days
- Express: 1-2 business days
Order Tracking:
You'll receive a tracking link by email once your Heat Exchanger, Pentair MasterTemp/Max-E-Therm 400, Nat./LP ships.
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Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
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Based on 1061 reviews
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Product Reviews
★★★★★ 4
Tight
Style: BE-966P 1-Pack
It fits but its tight, the frame is stiffer than other brands and slightly larger so once its in im not sure how well its seated and is going to be a pain to remove next time
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 13, 2026
★★★★★ 5
great filters
Style: BE-157P 1-Pack
does a great job at providing maximum airflow.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 11, 2026
★★★★★ 1
Does NOT fit BMW F22 2 Series
Style: BE-472P 1-Pack
Does not fit BMW F22 2 Series. The housing for the cabin air filter is curved and the OEM cabin filter is flexible like an accordion. This filter has the correct dimensions but it does not flex so it will not fit the housing properly. You MIGHT be able to jam it in but not without damaging the filter and at that point it would be practically useless. Buy one that is OEM spec and confirm it can flex for proper fit.
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Reviewed in the United States on April 18, 2026
★★★★★ 3
It’s ok
Style: BE-157P 1-Pack
Not a perfect fit, decent quality. Fair product since it was significantly cheaper than the manufacturer filter.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 2, 2026
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