Raypak Pool Heater Millivolt Sensor Well | 006805F
Raypak
SKU: 006805F
Raypak 006805F Sensor Well (Thermowell) for Millivolt Pool Heaters
The Raypak 006805F is a stainless steel sensor well (thermowell) used on compatible Raypak millivolt-style pool heaters. It threads into the heater header and provides a protected pocket for the temperature sensing probe/capillary, helping ensure accurate temperature feedback while shielding the sensor from direct water flow and turbulence.
Key Details
- Manufacturer: Raypak
- Part Number: 006805F
- Part Type: Sensor well / thermowell
- Material: Stainless steel tube with brass threaded end
- Function: Houses/protects the temperature sensing element in the header for stable, reliable temperature control
Dimensions
- Inside Diameter (ID): 15/32"
- Outside Diameter (OD): 9/16"
- Length: 3-3/8"
Common Heater Compatibility
- Raypak 206A, 266A, 336A, 406A (Digital Atmospheric series)
- Raypak 207A, 267A, 337A, 407A (Digital Low NOx Millivolt series)
Note: Compatibility can vary by heater revision and header type. The most reliable confirmation is matching the part number from your heater’s parts breakdown or comparing the original sensor well dimensions and thread style.
What This Part Does
- Provides a sealed, threaded mounting point in the heater header for the temperature sensor.
- Protects the sensing element from direct water impact, helping improve stability and reduce premature sensor damage.
- Helps maintain accurate heater cycling and temperature regulation when the sensor is properly seated in the well.
When to Replace
- Water seepage/leaking at the sensor well/header connection
- Cracked, corroded, or damaged well tube or threaded end
- Sensor will not seat properly, is loose, or cannot be secured
- Header service where the original well is seized or damaged during removal
Installation Notes
- Shut off gas and power, and allow the heater to cool completely before servicing.
- Relieve system pressure and drain down as needed to prevent water loss when the well is removed.
- Thread the well in carefully to avoid cross-threading the header.
- After installation, confirm the sensor is fully seated in the well and secured per the heater design.
- Restore flow and check for leaks after startup.
Related Products (Aqua Pool Supply)
- Raypak temperature sensor (003346F)
- Raypak header gaskets
- Raypak high limit switches
- Raypak pressure switches
- Raypak heater sensor parts
Maintenance Tip
If you’re troubleshooting temperature issues, inspect the sensor seating and the sensor well opening for scale buildup. Keeping the sensor fully seated and the well clean helps the heater read water temperature accurately and cycle properly.
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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