Pentair ETI-400 Indoor Air Intake Kit | 475971
Pentair
SKU: 475971
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ETi 400 Heater
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See this part on the interactive diagram
ETi 400 Heater
Pentair ETI-400 Indoor Air Intake Kit | 475971
The Pentair ETI-400 Indoor Air Intake Kit (475971) is an accessory designed specifically for the Pentair ETI-400 Condensing Gas Heater. This kit allows the heater to safely draw combustion air from an indoor mechanical room or equipment space when outdoor air access isn’t ideal or available, helping ensure proper combustion and efficient operation in enclosed installations.
What This Part Is For
This indoor air intake kit is intended for use with the Pentair ETI-400 Condensing Gas Heater when installed inside utility rooms, garages, or other enclosed areas where direct outdoor air intake is not feasible. It provides a dedicated pathway for combustion air from within the space while maintaining safe clearances and airflow required by the heater’s design.
Features & Benefits
- Designed for indoor installations of the Pentair ETI-400 condensing heater
- Allows combustion air to be drawn from a mechanical room or enclosed space
- Helps maintain optimal combustion performance when outdoor intake is restricted
- Includes components engineered to match OEM specifications for fit and function
Installation Notes
- Follow manufacturer instructions to maintain required clearances and proper airflow
- Seal all intake connections to prevent back-drafting and ensure safe combustion
- Verify that the heater has adequate air supply before operation
- Work with a qualified HVAC or gas professional for proper indoor combustion air setup
Maintenance Tips
- Periodically inspect intake ducting for obstruction or debris buildup
- Check seals and connections to prevent air leaks
- Keep surrounding areas clear of obstructions to support proper airflow
Related Products
- Pentair ETI-400 Condensing Gas Heater – The main heater model that this indoor air intake kit is designed to work with.
- Pentair ETI400 Condensate Neutralizer Replacement Kit – Replacement kit for treating acidic condensate before drain discharge.
- Pentair ETI400 Stack Flue Sensor Replacement Kit (475601) – Replacement flue sensor part to help maintain safe combustion monitoring.
- Pentair ETI400 Service Kit – General maintenance kit with common service parts for the ETI400 heater.
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.
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