Does it fit all hot tub models?

No; They specifically fit Watkins Hot Spring 3.5" standpipe caps; includes 1 gray cap replacing part 36513 for your silver ion line and 2 white caps replacing part 31389; please verify your model compatibility before ordering

Is it easy to install?

Yes; tool free installation takes less than a minute; simply power off your hot tub; unscrew your old brittle cap counterclockwise; thread your new replacement cap on clockwise until hand tight for a straightforward stable fit

How often to replace?

These caps typically last two to three years; replace them immediately if you notice surface cracking or structural brittleness from heavy chemical or UV exposure; proactive replacement ensures your filter remains locked down safely

Why you might like this?

This 3-pack delivers exact color unified matching at a fraction of factory cost; made of reinforced PP to lock filters vertically; features zero chemical conflicts with saltwater systems while protecting your pump from bypass debris

What happens if I don't replace a brittle or cracked standpipe cap?

Cracked or brittle caps allow loose debris to bypass filter pleats and flow into plumbing lines; presents an immediate risk of catastrophic heater or pump clogging; replacing your caps proactively safeguards your hot tub investment

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Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

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3-1/2 Inch Hot Tub Stand Pipe Cap Compatible with Watkin Hot Spring Spas Filter Standpipe (1,White)

3-1/2 Inch Hot Tub Stand Pipe Cap Compatible with Watkin Hot Spring Spas Filter Standpipe (1,White)

Product ID: 466233089

Details

Brand
HOTUBJOY
Colour
White
Material
Reinforced
Product Dimensions
43L x 81W x
Shape
Round

💧Chemical-resistant for spa longevity

⚙️3.5-inch precision fit

🛡️Reinforced break-resistant plastic

₨750

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Sold byAmazon SeychellesDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🛁 Lock in purity, unlock endless relaxation!

EFFORTLESS COMPATIBILITY - Designed specifically for 3-1/2 inch Watkin Hot Spring Spas filters for a perfect, no-fuss fit.
SAVE MONEY AVOID DOWNTIME - Durable cap reduces maintenance needs and protects your spa’s pump and heater from damage.
KEEP IT CLEAN KEEP IT CLEAR - Blocks debris and dirt from entering your spa’s inner workings, ensuring crystal-clear water every soak.
SECURE YOUR SPAS HEARTBEAT - Screws firmly onto the standpipe to lock your filter in place, preventing costly pump damage.
BUILT TO LAST BUILT TO PROTECT - Crafted from reinforced plastic that resists breakage and harsh spa chemicals for extended service life.

The HOTUBJOY 3-1/2 Inch Hot Tub Stand Pipe Cap is a durable, reinforced plastic cap designed to securely fasten onto Watkin Hot Spring Spas filter standpipes. It prevents debris from entering the spa’s pump and heater system, extends filter life, and resists common spa chemicals, ensuring your hot tub stays clean and damage-free with minimal maintenance.

Specifications

ASIN	B09H6TRC77
Assembly Required	No
Brand	HOTUBJOY
Colour	White
Country of Publication	USA
Customer Reviews	4.8 out of 5 stars 138 Reviews
Enclosure Material	Reinforced Plastic
Is Assembly Required?	No
Item Dimensions L x W x H	43L x 81W x 89H Millimeters
Item Type Name	3-1/2" Cap
Manufacturer	HOTUBJOY
Manufacturer Part Number	3-1/2" Cap
Material	Reinforced Plastic
Model Name	3-1/2" Cap
Model Number	3-1/2" Cap
Product Dimensions	43L x 81W x 89H Millimeters
Shape	Round

Reviews

S**.

Thumbs up

Perfect fit & price

10.08.2026

M**N

Perfect fit just like oem

I have a hot springs tx2 I bought used and it was missing the filter cap. These fit perfectly

14.07.2026

J**F

Great product

Perfect fit

30.05.2026

L**A

Worked fantastic!

8.05.2026

A**E

Perfect fit

Perfect fit for my hot springs tub

26.07.2026

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₨750

Duties & taxes included

In stock

Sold byAmazon SeychellesDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Seychelles.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Farhan Q.

The delivery time was excellent, and the packaging was secure.

2 months ago

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