---
product_id: 350754429
title: "Mueller/B & K 108-904RP Backflow Preventer-Vacuum Breaker"
brand: "mueller b & k"
price: "$83"
currency: NZD
in_stock: true
url: https://www.desertcart.nz/products/350754429-mueller-b-and-k-108-904rp-backflow-preventer-vacuum-breaker
store_origin: NZ
region: New Zealand
---

# Vandal-resistant lock screw option Fits any 3/4'' hose thread outlet Nonfreezing areas only Mueller/B & K 108-904RP Backflow Preventer-Vacuum Breaker

**Brand:** mueller b & k
**Price:** $83
**Availability:** ✅ In Stock

## Summary

> 🚰 Secure your water, secure 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?** $83 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.nz](https://www.desertcart.nz/products/350754429-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

- • **Vandal-Resistant Security:** Equipped with a break-a-way lock screw for secure, tamper-proof installations.
- • **Manual Drain Release Valve:** Easily drain the valve after use to avoid freezing damage in colder conditions.
- • **Certified Quality Assurance:** I.A.P.M.O. and A.S.S.E. approved for trusted, professional-grade performance.
- • **Universal Hose Compatibility:** Seamlessly fits all standard 3/4'' hose thread outlets for effortless installation.
- • **Backflow Protection Guaranteed:** Prevents dangerous back siphonage to keep your potable water supply pristine and safe.

## Overview

The Mueller/B & K 108-904RP Backflow Preventer-Vacuum Breaker is a professional-grade plumbing accessory designed to protect potable water supplies from contamination by preventing back siphonage. Ideal for nonfreezing indoor or outdoor use, it fits any 3/4'' hose thread outlet and features a manual drain release valve and optional vandal-resistant lock screw. Certified by I.A.P.M.O. and A.S.S.E., this compact device ensures reliable, code-compliant water safety.

## 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 |
| Country of Origin | USA |
| Item model number | FBA_108-904RP |
| Product Dimensions | 10.16 x 7.62 x 7.62 cm; 4.54 g |
| ASIN | B000DZHA7S |

## 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

## Frequently Bought Together

- Mueller FBA_108-904RP 108-904RP Backflow Preventer-Vacuum Breaker
- Homewerks Worldwide VACBFPZ4B Vacuum Breaker Hose Bib Backflow Preventer, 3/4 Inch, Brass
- Rain Bird HT07525PSI Drip Irrigation 25 PSI Pressure Regulator, 3/4" Female Hose Thread x 3/4" Male Hose Thread

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**Shop now:** [https://www.desertcart.nz/products/350754429-mueller-b-and-k-108-904rp-backflow-preventer-vacuum-breaker](https://www.desertcart.nz/products/350754429-mueller-b-and-k-108-904rp-backflow-preventer-vacuum-breaker)

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*Product available on Desertcart New Zealand*
*Store origin: NZ*
*Last updated: 2026-02-19*