---
product_id: 287284232
title: "B and K Industries 109-503RP Anti-Sweat Toilet Tank Valve"
brand: "mueller"
price: "KSh11174"
currency: KES
in_stock: true
url: https://www.desertcart.co.ke/products/287284232-b-and-k-industries-109-503rp-anti-sweat-toilet-tank
store_origin: KE
region: Kenya
---

# Stops condensation & dripping Built-in check valves prevent cross-connection Adjustable water temperature B and K Industries 109-503RP Anti-Sweat Toilet Tank Valve

**Brand:** mueller
**Price:** KSh11174
**Availability:** ✅ In Stock

## Summary

> 🚿 Keep it cool, dry, and flawless—your bathroom’s new best friend!

## Quick Answers

- **What is this?** B and K Industries 109-503RP Anti-Sweat Toilet Tank Valve by mueller
- **How much does it cost?** KSh11174 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.ke](https://www.desertcart.co.ke/products/287284232-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

- • **Cross-Connection Safety:** Built-in check valves prevent hot and cold water from mixing, safeguarding your plumbing system.
- • **Condensation? Gone for Good!:** Eliminates moisture buildup on toilet tanks and floors, protecting your bathroom’s sleek look.
- • **Permanent Anti-Sweat Solution:** Far superior to temporary tank liners, this brass valve offers a durable, maintenance-free fix.
- • **Precision Temperature Control:** Easily adjust water temperature to suit seasonal needs, ensuring optimal performance year-round.
- • **Seasonal Shut-Off Convenience:** Hot water inlet can be shut off during off-season, saving energy and reducing wear.

## Overview

The Mueller B and K Industries 109-503RP Anti-Sweat Toilet Tank Valve is a durable brass plumbing fixture designed to eliminate toilet tank condensation and dripping. Featuring adjustable water temperature, built-in check valves to prevent hot/cold water cross-connection, and a seasonal shut-off option, it offers a permanent, maintenance-free solution superior to traditional tank liners.

## Description

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

## Features

- Eliminates condensation, prevents dripping of toilet tanks, ends moisture on floors
- Built-in check valves prevent hot and cold water cross connection
- Water temperature is adjustable
- Hot water inlet can be shut-off during off-season
- Superior to tank liners, provides a permanent solution

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | Mueller Industries |
| Part number | 109-503RP |
| Item Weight | 349 g |
| Product Dimensions | 13.97 x 9.22 x 3.81 cm; 349 g |
| Item model number | 109-503RP |
| Size | 5/8'' OD Compression |
| Color | Tan |
| Material | Brass |
| Power source type | No |
| Item Package Quantity | 1 |
| Included components | B and K Industries 109-503RP Anti-Sweat Toilet Tank Valve |
| Batteries Included? | No |
| Batteries Required? | No |

## Product Details

- **Material:** Brass
- **Brand:** Mueller
- **Item dimensions L x W x H:** 14 x 9.2 x 3.8 centimeters
- **Exterior finish:** Stainless Steel
- **Inlet connection size:** 3.63 Millimeters

## 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.

## 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

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.co.ke/products/287284232-b-and-k-industries-109-503rp-anti-sweat-toilet-tank](https://www.desertcart.co.ke/products/287284232-b-and-k-industries-109-503rp-anti-sweat-toilet-tank)

---

*Product available on Desertcart Kenya*
*Store origin: KE*
*Last updated: 2026-02-14*