Need help finding a part? Text photos: 772-800-5445 | Call: 844-500-4645
Welcome to the updated SpaPartsNet!
Need help finding a part?
Text photos: 772-800-5445
|
Call: 844-500-4645
We’ve upgraded the site with more products and better shipping prices.
USA Shipping Promo:
FREE SHIPPING in the USA on parts orders over $75
(Excludes Alaska & Hawaii and oversized/heavy items.)
Note: Oversized/heavy items (like complete pumps) may require additional shipping charges, especially to AK/HI.
Previous Customers (Important)
If you previously had an account, your information is still here — you’ll just need to reset your password because passwords did not transfer during the migration.
Reset Your PasswordNote: Some heavier items (such as complete pumps) may have shipping limitations outside of the USA.
Welcome to the updated SpaPartsNet!
Need help finding a part?
Text photos: 772-800-5445
|
Call: 844-500-4645
We’ve upgraded the site with more products and better shipping prices.
USA Shipping Promo:
FREE SHIPPING in the USA on parts orders over $75
(Excludes Alaska & Hawaii and oversized/heavy items.)
Note: Oversized/heavy items (like complete pumps) may require additional shipping charges, especially to AK/HI.
Previous Customers (Important)
If you previously had an account, your information is still here — you’ll just need to reset your password because passwords did not transfer during the migration.
Reset Your PasswordNote: Some heavier items (such as complete pumps) may have shipping limitations outside of the USA.
Shop by Category
Shop by Brand
Thermowell Plumbing Fittings
Hot Tub PVC Thermowell Fittings for Spa Temperature Sensors
Shop PVC thermowell fittings for hot tub plumbing systems. Thermowells house temperature sensors inside a protective sleeve, allowing accurate water temperature readings without direct sensor exposure.
These fittings are commonly used in heater manifolds and spa control plumbing assemblies.
Proper sizing ensures secure sensor installation and leak free plumbing connections.
Slip vs Street Also Called Spigot
Slip thermowell fittings glue over pipe.
Street style thermowells have a male spigot end that inserts into a slip fitting. The outside diameter matches the nominal pipe size.
How to Measure Spa Plumbing
Measure the outside diameter of your pipe before ordering fittings.
Standard PVC Pipe Outside Diameter Chart
Nominal Pipe Size Actual Outside Diameter
1/2 inch 0.840 inch
3/4 inch 1.050 inch
1 inch 1.315 inch
1-1/2 inch 1.900 inch
2 inch 2.375 inch
2-1/2 inch 2.875 inch
3 inch 3.500 inch
Threaded Plumbing Parts Size Chart
Threaded Size Approximate Outside Diameter of Male Threads
1/2 inch MPT approx 0.840 inch
3/4 inch MPT approx 1.050 inch
1 inch approx 1.315 inch
1-1/2 inch approx 1.900 inch
2 inch approx 2.375 inch
Need help verifying size? Text photos to 7728005445 or call 8445004645.