---
product_id: 66550752
title: "Mueller/B & K 108-904RP Backflow Preventer-Vacuum Breaker"
brand: "mueller b & k"
price: "฿646"
currency: THB
in_stock: false
reviews_count: 1
url: https://www.desertcart.co.th/products/66550752-mueller-b-and-k-108-904rp-backflow-preventer-vacuum-breaker
store_origin: TH
region: Thailand
---

# Fits any 3/4'' hose thread outlet Nonfreezing areas only - manual drain to prevent freeze I.A.P.M.O. & A.S.S.E. certified backflow protection Mueller/B & K 108-904RP Backflow Preventer-Vacuum Breaker

**Brand:** mueller b & k
**Price:** ฿646
**Availability:** ❌ Out of Stock

## Summary

> 🛠️ Protect your water, protect your peace of mind.

## Quick Answers

- **What is this?** Mueller/B & K 108-904RP Backflow Preventer-Vacuum Breaker by mueller b & k
- **How much does it cost?** ฿646 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.co.th](https://www.desertcart.co.th/products/66550752-mueller-b-and-k-108-904rp-backflow-preventer-vacuum-breaker)

## Best For

- mueller b & k enthusiasts

## Why This Product

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

## Key Features

- • **Compact & Durable:** Brass construction in a sleek, lightweight design built to last and blend in.
- • **Freeze-Safe Design:** Manual drain valve ensures protection in nonfreezing climates—no surprises come winter.
- • **Vandal-Resistant Security:** Includes break-away lock screw option for peace of mind in public or shared spaces.
- • **Certified Safety Assurance:** Backflow prevention meets top industry standards for potable water protection.
- • **Universal Hose Compatibility:** Seamlessly fits standard 3/4'' hose threads for effortless installation.

## Overview

The Mueller/B & K 108-904RP Backflow Preventer-Vacuum Breaker is a brass, compact device designed to prevent back siphonage and contamination of potable water. It fits any 3/4'' hose thread outlet, is suitable for indoor/outdoor use in nonfreezing areas, and features a manual drain release to avoid freezing damage. Certified by I.A.P.M.O. and A.S.S.E., it includes a vandal-resistant lock screw option for secure installations.

## Description

Attached to sill cocks, valves, and hydrants with Male hose thread outlet. For indoor or outdoor use. Designed to prevent dangerous back siphonage and back flow into a potable water supply. Furnished with break-a-way lock screw if vandal-resistant installation is desired. For nonfreezing areas only. Designed to protect hose connections from contamination where temperatures do not get below freezing. Outlet side of vacuum breaker has a manual drain release of check valve to allow complete draining of valve, but must be operated manually after hose is disconnected to prevent valve from freezing. I.A.P.M.O. and A.S.S.E. approved. 1 each per display pack for peg hook hanging. Import.

## Features

- For nonfreezing areas only
- Fits any 3/4'' hose thread outlet
- Brand Name: Mueller
- Manufacturer: Mueller

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | Mueller |
| Part Number | FBA_108-904RP |
| Product Dimensions | 10.16 x 7.62 x 7.62 cm; 4.54 g |
| Item model number | FBA_108-904RP |
| Size | Pack of 1 |
| Material | Brass |
| Item Package Quantity | 1 |
| Number of Pieces | 1 |
| Measurement System | inch |
| Batteries included? | No |
| Batteries Required? | No |
| Item Weight | 4.54 g |

## Images

![Mueller/B & K 108-904RP Backflow Preventer-Vacuum Breaker - Image 1](https://m.media-amazon.com/images/I/710w7FowSZL.jpg)

## Questions & Answers

**Q: Does  the female portion of this item have FINE treads and the male portion to hook the hose to should be normal hose threads ?**
A: Both are standard garden hose threads. (MHT	Male hose thread)(FHT	Female hose thread)

**Q: Can I use this for laundry tubs?**
A: When the water pressure is shut off the excess water in the hose which would normally flow back into the hose instead comes out the small holes around the edge so I would not recommend using this anywhere you would want to stay dry.

**Q: I am looking for fine threads on the house side of the vacuum breaker and the course threads on the hose side. Does this one have that configuration?**
A: Check out:  SpigotMaster ~SM01 Vacuum Breaker Adapter~ Converts an Arrowhead PK1390 Anti-Siphon Valve Into a Straight Through Connection 
https://www.amazon.com/SpigotMaster-Adapter-Arrowhead-Anti-Siphon-Connection/dp/B07BD4H8RP/ref=cm_cr_arp_d_product_top?ie=UTF8

**Q: Does it include rubber washer?**
A: mine shipped with a rubber washer

## Customer Reviews

### ⭐ 1.0 out of 5 stars







  
  
    Useless
  

*by P***I on Reviewed in the United Kingdom 🇬🇧 on 14 November 2013*

Useless - absolutely useless for use in the UKWater-water everywhere... The threads do not match and there are holes all around it on the outlet side - you can just see the reflection of them in the photograph. It screws onto my outside tap. I can connect nothing to it - it leaks and it does not pass water where you'd expect it to.Made in China for Mueller - a US company - ordered 26th October & delivered 19 days later.19 minutes after it arrived I consigned it to the bin.

## Frequently Bought Together

- Mueller FBA_108-904RP 108-904RP Backflow Preventer-Vacuum Breaker
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- Rain Bird HT07525PSI Drip Irrigation 25 PSI Pressure Regulator, 3/4" Female Hose Thread x 3/4" Male Hose Thread

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*Product available on Desertcart Thailand*
*Store origin: TH*
*Last updated: 2026-02-26*