---
product_id: 16065335
title: "B and K Industries 109-503RP Anti-Sweat Toilet Tank Valve"
brand: "mueller"
price: "A$87"
currency: AUD
in_stock: true
reviews_count: 8
url: https://www.desertcart.com.au/products/16065335-b-and-k-industries-109-503rp-anti-sweat-toilet-tank
store_origin: AU
region: Australia
---

# Quality Taiwan manufacturing Stops condensation drip Precision 1/2-in sweat connections B and K Industries 109-503RP Anti-Sweat Toilet Tank Valve

**Brand:** mueller
**Price:** A$87
**Availability:** ✅ In Stock

## Summary

> 💧 Stay dry, stay sharp — the anti-sweat valve your bathroom deserves!

## Quick Answers

- **What is this?** B and K Industries 109-503RP Anti-Sweat Toilet Tank Valve by mueller
- **How much does it cost?** A$87 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.au](https://www.desertcart.com.au/products/16065335-b-and-k-industries-109-503rp-anti-sweat-toilet-tank)

## Best For

- mueller enthusiasts

## Why This Product

- Trusted mueller brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Engineered for Endurance:** Crafted with durable materials to maintain flawless performance over time.
- • **Seamless Fit, Zero Hassle:** Standard 1/2-inch sweat inlet/outlet ensures easy, leak-free installation.
- • **Upgrade Your Bathroom Game:** Prevent unsightly drips and protect your space effortlessly.
- • **Condensation? Gone for Good!:** Eliminates moisture buildup to keep floors dry and pristine.
- • **Made in Taiwan, Trusted Worldwide:** Manufactured with precision to meet high-quality standards.

## Overview

The B and K Industries 109-503RP Anti-Sweat Toilet Tank Valve is a precision-engineered plumbing component designed to eliminate condensation and prevent dripping from toilet tanks. Featuring standard 1/2-inch sweat inlet and outlet connections, this valve ensures a secure, leak-free fit. Manufactured in Taiwan, it combines durability with high-quality craftsmanship to protect floors from moisture damage and enhance bathroom maintenance.

## Description

B and K Industries 109-503RP Anti-Sweat Toilet Tank Valve

## Features

- Eliminates condensation, prevents dripping of toilet tanks, ends moisture on floors
- Product is manufactured in Taiwan
- This product meets customer requirement

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Brand | MUELLER |
| Item dimensions L x W x H | 5.5 x 3.63 x 1.5 inches |
| Inlet Connection Type | Sweat |
| Outlet Connection Type | Sweat |
| Number of Ports | 2 |
| Specification Met | No |
| Valve Type | Toilet Tank Valve |
| Global Trade Identification Number | 00032888300880, 00032888095038 |
| Manufacturer | Mueller Industries |
| UPC | 032888095038 032888300880 787721761457 |
| Part Number | 109-503RP |
| Item Weight | 12.3 ounces |
| Product Dimensions | 5.5 x 3.63 x 1.5 inches |
| Item model number | 109-503RP |
| Is Discontinued By Manufacturer | No |
| Size | 1/2-in OD x 1/2-in SWT |
| Power Source | No |
| Item Package Quantity | 1 |
| Included Components | B and K Industries 109-503RP Anti-Sweat Toilet Tank Valve |
| Batteries Included? | No |
| Batteries Required? | No |
| Warranty Description | No |

## Product Details

- **Brand:** MUELLER
- **Item dimensions L x W x H:** 5.5 x 3.63 x 1.5 inches
- **Inlet Connection Type:** Sweat
- **Outlet Connection Type:** Sweat
- **Number of Ports:** 2
- **Specification Met:** No
- **Valve Type:** Toilet Tank Valve
- **Global Trade Identification Number:** 00032888300880, 00032888095038
- **Manufacturer:** Mueller Industries
- **UPC:** 032888095038 032888300880 787721761457

## Images

![B and K Industries 109-503RP Anti-Sweat Toilet Tank Valve - Image 1](https://m.media-amazon.com/images/I/81nezDyBjLL.jpg)

## Questions & Answers

**Q: what size pipe  can it be used on?**
A: I used 1/2" pipe fittings which made for an easy installation.  The photo shows it set for 1/2" copper tubing so I don't know if they changed it or if it can be used either way.  I think it can but I would contact Mueller to be sure.

**Q: Could cross connection happen with this valve?**
A: Not sure what you mean by "cross connection". This type of valve simply connects your cold water and hot water pipes together before it supplies your toilet tank. You can adjust the temperature to stop condensation on your toilet. The water in the tank does not need to be too warm. Adjust it as cool as it can be to stop the condensation and save on your hot water bill. These valves work great.

**Q: how do you hook up to 1/2" copper pipes?**
A: You can use the compression fittings provided with the valve or you can install  1/2 "copper female adapters to the valve and solder the pipe to them.

**Q: does the big screw on both hot and cold sides increase or decrease total flow?**
A: I'm no expert but the total flow is going to be determined by the outlet side.  Unless you turn both screws way down, it should only adjust the hot to cold water ratio.  Just my opinion though.

## Customer Reviews

### ⭐⭐⭐⭐⭐ works great
*by D***U on February 8, 2023*

At my camp, did't matter if it was summer or winter, toilet would sweat. This went on for ten years.Can't tell you how many plumbers didn't know the answer to correct this.Looked on you tube, and heard everything from insulating inside of tank to insulating outside of tank.Happened to read an article about this valve. No plumbing supply house that I called had this part.Figured for the price, give it a try. The pex fittings were more than the part.Took about an hour to pipe in,but it solved the problem.Toilet hasn't sweat since

### ⭐⭐⭐⭐⭐ Why did I wait so long
*by R***E on August 26, 2013*

I have been replacing the Berber Carpet tiles behind my toilet a few times a year for Fifteen years because they are damp and stink from tank and bowl sweating. This is a well made thought out valve. The check valves that are built in stop the back feeding from the hot pipe to the cold pipe and vice versa . Easy to adjust the proper amount of hot to be added with the turn of a screw.With a few dollars of CPVC fitting and pipe it was a easy install. I have a ventless heater so my humidity is high all year around so this is a must have . Great product and as usual great service from Amazon.

### ⭐⭐⭐⭐⭐ Get this if your tank is sweating and be done with it.
*by S***N on July 2, 2015*

This fixed my toilet tank sweating issue immediately. It's been installed one month now and is working great. NPT threads are great. Makes it easy to go to Pex. Simply get 3 half inch pipe thread to Pex fittings and you are set. Two plumbers and the hardware store guy all said this would not work but it did! This is pipe thread regardless of what anyone else tells you. I did not adjust the mix valve as water in my tank comes in around 65 degrees which prevents sweating even after a steamy hot shower. This is the answer to a sweating toilet tank.

## Frequently Bought Together

- Mueller Industries B and K Industries 109-503RP Anti-Sweat Toilet Tank Valve
- SharkBite 1/2 x 1/2 Inch FNPT Adapter, Pack of 4, Push To Connect Brass Plumbing Fitting, PEX Pipe, Copper, CPVC, PE-RT, HDPE, U072LFA4
- SharkBite 1/2 Inch Tee, Push to Connect Brass Plumbing Fitting, PEX Pipe, Copper, CPVC, PE-RT, HDPE, U362LFA

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*Product available on Desertcart Australia*
*Store origin: AU*
*Last updated: 2026-02-19*