THE SAFE-T-COVER BLOG

Multiple Backflow Preventers in One Aluminum Building

Most commercial buildings require three separate water lines – an irrigation line, a domestic line and a fire protection line. Each of these water lines needs a separate backflow preventer to keep the downstream water safe from a backflow event. Different rules apply for which type of backflow preventer is required for each of these three water lines. These days, most states require an RPZ type assembly for irrigation use. RPZ type assemblies are becoming increasingly common for both domestic and fire protection service.

Many engineers and architects prefer multiple backflow preventers to be located inside one larger aluminum building, rather than a separate enclosure for each protected water line. This makes sense for several reasons.

  1. It is more economical to purchase one wider enclosure instead of two or three separate enclosures. Most manufacturers have standard models to handle dual (side by side) backflow preventers.
  2. The single cover for multiple backflow preventers is more aesthetically pleasing than multiple enclosures on the property. The view for the extra wide enclosure is the same from the road as the largest of the three enclosures for the water lines. This is a big deal with most architects and property owners.
  3. Having two or three of the backflow preventers inside a single enclosure makes maintenance easier, because all the backflow preventers are in one place. Most aluminum enclosure manufacturers have an access panel on each side of the cover, making testing and maintenance accessibility easy.

You can see below two examples of multiple devices inside one aluminum enclosure. Click on them to see them larger and more clearly. For both of these systems, Safe-T-Cover was able to use one of our standard models. The first is a 1000T-AL, and the second is a 600DS-AL. As you can see, it's possible and even common for manufacturers to have standard models wide enough to fit dual backflow preventers.

backflow enclosure with two devices.pngthree backflow preventers in one industrial enclosure.png

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

What questions need to be answered if you decide to place multiple backflow preventers inside a single aluminum enclosure?

  • How far apart do you want the backflow preventers? Many people want the backflow preventers spaced 8” or 12” apart. Some want them 18” apart. Sometimes the specification reads 24” distance from centerline to centerline. This is a question for the design engineers.
  • Do I need room inside the enclosure to walk around the perimeter for easy testing and maintenance? No. Most enclosure manufacturers have an access panel that is at least 36” wide on each side. Access for testing and maintenance is easy.
  • How do I know which size to specify if I want to put two or three backflow preventers inside a single enclosure? You need to call your manufacturer and have them properly size the cover for you. Some manufacturers have standard “dual” size boxes that can accommodate two or three backflow preventers. In some cases a custom enclosure will be needed.
  • Can I place two “compact design” backflow preventers inside a standard sized enclosure? Yes, generally you can. Call your enclosure manufacturer to be sure.

It makes sense to use a single aluminum building for multiple backflow devices. Sometimes, two or more backflow preventers will fit inside a large standard sized enclosure. However, Safe-T-Cover can make a custom enclosure to fit your exact dimensions if needed for multiple backflow preventers. Safe-T-Cover has created drawings for many jobs that required multiple backflow preventers inside a single enclosure. Over the years we have created hundreds of designs for multiple devices inside a single enclosure. Please reach out to us to see if we already have one that matches your specifications, or to work with us on creating a new one specifically for your requirements.

New Call-to-action

Related Posts

3 Reasons Why a Backflow Cover Must Have Heat

From the Field: Tips for Safe-T-Cover Enclosures and Protective PVC Coating

Why RPZ Valves Are Required and How to Install One

How To Design A Pump Enclosure

Aluminum Pump Enclosures vs. Pump Packages

From the Field – National Backflow Prevention Day

Standing out by blending in: Safe-T-Cover enclosures made to order

Forward thinking in Arlington, Texas: Leading the way with public health and backflow preventers

Enclosure Checklist: Summertime is the right time to think about winter

Enclosures for Control Valves

From the Field: June 2022

Introducing the MUNI-LOK from Safe-T-Cover

Customizing your aluminum enclosure for pipe penetration

Keep Pump Equipment Cool During Summer Heat

Air Cooler Enclosure Solves End-User Problem

Aluminum Enclosure Spring Maintenance Checklist

3 Reasons to Use Above-Ground Backflow Enclosures and Meters — from Water Contamination to Injury

Heated Backflow Enclosure — Comparing Names, Products & Vendors

Installing Fire Dept Connection & Backflow Prevention Valve for Safety

What is a Backflow Enclosure?

Should I Cover My Well Pump? (Well Pump Cover Info)

New Safe-T-Cover LES Models

Backflow Covers: Smaller Footprint Saves Space

VE Sales (MI) Case Study: Above-Ground Oil Water Separator

Follow This Custom Enclosure Design Checklist To Protect Your Equipment

The Right Way to Improve Backflow Cover Aesthetics — Use Landscaping

How to Quickly and Safely Remove a Safe-T-Cover Roof

3 Tips for Securing Equipment and Accessories to Interior Enclosure Walls

Hinged Access Panels Keep Things Safe in Windy Conditions

Top 6 Questions About Covering a Pressure Reducing Valve Station

Finding The Right Style Enclosure For A Small Pump Package

Virtual Trade Shows Aren't Perfect, But They are Effective

How To Keep Your Pump Cover Cool In Warm Weather

5 Ways Panel Design Equipment Covers Offer Superior Flexibility

The Best Way to Landscape Around a Backflow Enclosure

CASE STUDY - TRIPLEX WATER BOOSTER PUMP COVER

Quintessential List of Backflow Preventer Enclosure FAILS

Case Study - Water Corrosion Control System Enclosure

Project Engineer vs. Maintenance - A Valve & Pump Covers Tug-of-War

How are Backflow Covers Made?

Three Reasons Why You Should Choose an N-Type Device

Comparing The Costs Of Backflow Enclosures and Buildings

The Right Backflow Insulation Cover & Heater For You | Backflow Cover

A Backflow Cage May Not Be Enough To Protect Your Backflow Preventer

Find The Right Backflow Cover For You

Infographic: Backflow Preventer Design Done Right

How To Size A Custom Backflow Enclosure

What Does It Mean To Think Outside The Vault?

How We Construct Our Backflow Enclosures and Pump Covers

This Is How Vinyl Wraps Disguise Backflow Enclosures

How to design & Buy a Pump Enclosure

Get the free, editable checklist.

download-cta
DOWNLOAD NOW

CONTACT US

Have a question about a backflow preventer enclosure?
Click the contact us button below and one of our experts will be able to help with your specific enclosure needs.