---
product_id: 162227048
title: "WATTS 1/2 inch B911-M3 threaded combination water feeder and backflow preventer"
brand: "watts"
price: "Rp6877344"
currency: IDR
in_stock: true
reviews_count: 13
category: "Watts"
url: https://www.desertcart.id/products/162227048-watts-1-2-inch-b911-m3-threaded-combination-water-feeder
store_origin: ID
region: Indonesia
---

# 1/2 inch NPT threaded connection High capacity fill valve Pre-assembled for quick install WATTS 1/2 inch B911-M3 threaded combination water feeder and backflow preventer

**Brand:** watts
**Price:** Rp6877344
**Availability:** ✅ In Stock

## Summary

> 🚰 Elevate your plumbing game with Watts’ all-in-one powerhouse!

## Quick Answers

- **What is this?** WATTS 1/2 inch B911-M3 threaded combination water feeder and backflow preventer by watts
- **How much does it cost?** Rp6877344 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.id](https://www.desertcart.id/products/162227048-watts-1-2-inch-b911-m3-threaded-combination-water-feeder)

## Best For

- watts enthusiasts

## Why This Product

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

## Key Features

- • **Bronze Durability:** Robust bronze body built to last and resist corrosion
- • **Service Made Simple:** Easy access for maintenance keeps your system running smooth
- • **Optimized Flow Control:** High capacity fill valve ensures efficient water feed without compromise
- • **Plug & Play Installation:** Pre-assembled design slashes setup time under 30 minutes
- • **Dual Protection, One Unit:** Combines backflow preventer & pressure regulator seamlessly

## Overview

The WATTS 1/2 inch B911-M3 is a premium threaded combination water feeder and backflow preventer featuring a durable bronze body, pre-assembled for rapid installation, and equipped with a high capacity fill valve. Designed for professional-grade plumbing systems, it integrates a Model 9D backflow preventer and Model 1156F pressure regulator, ensuring reliable water flow control and contamination prevention with easy service accessibility.

## Description

Consists of a Model 9D backflow preventer and Model 1156F feed water pressure regulator in one pre-assembled unit

Review: Works as should. - Works as should. Just beware. They come in 1/2 right up to 1 inch.
Review: Plumbing Supplies - This dual service water pressure and back flow valve is exceptional. The installation is super easy, it took me less than 30 mins to add to my hot water boiler. Highly recommend it, and the cost is better than most plumbing suppply warehouses.

## Features

- 1/2 inch B911-M3 Watts threaded combination water feeder and backflow preventer
- Bronze Body
- Pre-Assembled
- Easy Service Accessibility
- High Capacity Fill Valve

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00093DU5K |
| Best Sellers Rank | #204,014 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #6,767 in Pipe Fittings |
| Brand Name | Watts |
| Connector Type | Union |
| Customer Reviews | 4.7 4.7 out of 5 stars (92) |
| Exterior Finish | Bronze |
| Inlet Connection Size | 0.5 Inches |
| Inlet Connection Type | threaded |
| Item Dimensions | 8.5 x 2 x 5.25 inches |
| Manufacturer | WATTS |
| Material Type | Bronze |
| Model Number | B911T-M3 |
| Number of Ports | 3 |
| Outlet Connection Size | 0.5 Inches |
| Outlet Connection Type | Threaded |
| Specification Met | ASSE 1012 |
| Thread Size | 1/2 inch |
| Thread Type | NPT |
| UPC | 098268918533 |
| Unit Count | 1 Count |
| Valve Type | Dual Check with Atmospheric Vent |

## Product Details

- **Brand:** Watts
- **Exterior Finish:** Bronze
- **Inlet Connection Size:** 0.5 Inches
- **Inlet Connection Type:** threaded
- **Item dimensions L x W x H:** 8.5 x 2 x 5.25 inches
- **Material:** Bronze
- **Number of Ports:** 3
- **Outlet Connection Size:** 0.5 Inches
- **Outlet Connection Type:** Threaded
- **Specification Met:** ASSE 1012

## Images

![WATTS 1/2 inch B911-M3 threaded combination water feeder and backflow preventer - Image 1](https://m.media-amazon.com/images/I/51UOa8NJqnL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Works as should.
*by F***D on October 15, 2025*

Works as should. Just beware. They come in 1/2 right up to 1 inch.

### ⭐⭐⭐⭐⭐ Plumbing Supplies
*by D***I on January 26, 2025*

This dual service water pressure and back flow valve is exceptional. The installation is super easy, it took me less than 30 mins to add to my hot water boiler. Highly recommend it, and the cost is better than most plumbing suppply warehouses.

### ⭐⭐⭐⭐⭐ Great replacement piece.
*by P***K on September 6, 2025*

Works as it should.

## Frequently Bought Together

- WATTS 1/2 inch B911-M3 threaded combination water feeder and backflow preventer
- Taco 400-4 1/8-Inch-NPT Float Air Hy-Vent
- Watts 0342691 30 PSI Pressure Relief Valve, Bronze, 3/4" 335 M2-030

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**Shop now:** [https://www.desertcart.id/products/162227048-watts-1-2-inch-b911-m3-threaded-combination-water-feeder](https://www.desertcart.id/products/162227048-watts-1-2-inch-b911-m3-threaded-combination-water-feeder)

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*Product available on Desertcart Indonesia*
*Store origin: ID*
*Last updated: 2026-05-10*