How We Construct Our Backflow Enclosures and Pump Covers

The best way to design and assemble backflow and pump enclosures is to use marine-grade aluminum, polyisocyanurate insulation and a modular-panel design. An enclosure that is built in this manner will provide the best protection for your equipment. It will also be able to withstand the elements, but at the same time, provide easy access for testing. 

It’s important to understand that not all backflow enclosures are the same. Some are assembled before they’re shipped, others use spray-on insulation that leaves air gaps and collects dirt, while others are not ASSE 1060-certified.

Let’s take a look at the design and assembly process for Safe-T-Cover aluminum enclosures to see how it compares.  

Backflow Enclosure Design: Side Panels

The first step in putting together a high-quality aluminum enclosure is constructing the side panels. Each one is fitted with 1½ inch of polyiso insulation

backflow enclosureThe insulation is not glued to the enclosure panel, it’s cut to the exact dimensions of the panel, form-fitted around the edges of the insulation and held in place by rivets. A 2x4 piece of redwood also provides additional structural support. 

Safe-T-Cover-InsulateThis material is commonly used in the roofing industry and is superior to the spray-on insulation because it won’t crack over time or leave air gaps.  The R-value for polyisocyanurate insulation is the highest for rigid-board insulation at an average of 6.5 per inch. Standard Safe-T-Cover enclosures have 1.5 inches (R-9) of polyisocyanurate insulation in the walls and 3 inches (R-18) in the roof. By using such a high-quality material, the enclosures more than meet ASSE 1060’s requirement for insulation

Backflow Enclosure Design: Roof Panel

The design of Safe-T-Cover roof panels is very similar to that of the side panels. The design process is essentially the same. The biggest difference is the roof panel may get a larger 2x6 redwood beam for added strength and rigidity and 3 inches of insulation is used on the larger model enclosures. pump enclosure

How Our Backflow And Pump Enclosures Are Shipped

Safe-T-Cover enclosures are made using a modular panel design. This allows us to ship our enclosures flat to the customer or project site for assembly and to help keep shipping costs down. Each shipment comes with a step-by-step instruction guide, diagram, and installation hardware. 

pump enclosure

The installation hardware includes anchoring brackets, roof clips, anchors and screws. You’ll also receive a masonry bit and magnetic chuck. The only tools you’ll need are a drill, hammer, and a ¾-inch wrench. 

And with a little help, you can have your enclosure together in less than an hour. 

Learn how backflow enclosures are helping to save lives.


How To Assemble Safe-T-Cover Backflow and Pump Enclosures

A good practice before you begin assembling the enclosure is to mark the concrete base for the outside of the enclosure (3 inches wider than ID and 3 inches longer than ID).  Now locate the individual panels that will make up the enclosure.  

backflow enclosureTo make assembly a breeze, each panel is marked by descriptive stickers with letters on them. Panels marked with a letter “A” (on the right) are the sidewalls, letter “B” panels are the front and back of the enclosure, “C” panels are the access panels or doors, and the “D” panel is the roof. 

The “A” panels will have a channel along each end where the “B” panels will fit into them.  You’ll secure them with the provided hex-headed screws. Continue this method for the remaining A and B panels. 

pump enclosure The “C” access panels (on the left) can now be set in place before installing the roof panel(s).  Each access panel will have a foldable and pad-lockable handle, are completely removable, and have a drain flap.  

Next, you will want to place the “D” panels (roof panels) in place.  They’ll have channels along their edges where the A and B panels will fit into them.  backflow enclosure

Once this is done, secure the inside and outside anchoring brackets to the concrete slab (lower left image). Using the hex-headed screws, you’ll attach them to the B panel studs and the concrete anchors to secure it to the concrete slab.

backflow enclosureNext insert the Inside Roof Clips into the “D” (roof) panel at the “B” panel studs using a hex headed screw for each. 

If your enclosure is one of our dual models that requires a two-piece roof, fasten the Inner Roof Connection Brackets into place using hex headed screws covering the exposed 2x6 redwood studs. 

Now you’ll simply attach cover plates over the exposed seams on the exterior of the enclosure roof.

SafeTCoverEnclosuresSafe-T-Cover uses marine-grade aluminum, a high-quality metal that will typically outlast the equipment it is covering. Our enclosures come in four standard colors at the base price. Check our enclosures page to find a full list of 20 more colors that are available for an additional cost. Being able to choose the right color can often satisfy an owner’s objection to a big shiny box!

If you'd like to see how one of our enclosures come together, here's a video you can watch.


You can also check out our free guide: “How to Buy a Custom Enclosure.” This new checklist is designed to walk you through all the necessary steps for designing and buying a custom enclosure. 

Get the right enclosure size for your pump

Related Posts

Why RPZ Valves Are Required and How To Install One

Why Cages Don't Work

2022 Golden Enclosure Award Winners

Asking for Trouble: Why Your Well Pump Should Be Covered

Fire Pump Housing Options Beyond the Building

Heading into the unknown: Another Big Freeze could be catastrophic

3 Reasons Why a Backflow Cover Must Have Heat

The Anatomy of a Well Pump Cover

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

How To Design A Pump Enclosure

From the Field – National Backflow Prevention Day

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

Above Ground Valve Enclosures

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

Aluminum Enclosure Spring Maintenance Checklist

How to Find the Right Weatherproof Pump Enclosure

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?

How Big Should a Pump House Be?

How Do I Hide My Well Pump?

Climate Controlled Pump Covers: More Than Just for Winterization

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

New Safe-T-Cover LES Models

Backflow Covers: Smaller Footprint Saves Space

How Do You Cover A Well Pump?

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

Top 6 Questions About Covering a Pressure Reducing Valve Station

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

5 Ways Panel Design Equipment Covers Offer Superior Flexibility

Why An Over-Engineered Pump Enclosure Isn't Always Best

The Best Way to Landscape Around a Backflow Enclosure


Quintessential List of Backflow Preventer Enclosure FAILS

Case Study - Water Corrosion Control System Enclosure

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

How are Backflow Covers Made?

Case Study - Duplex Glycol Pump Cover

Three Reasons Why You Should Choose an N-Type Device


What Is The Best Type Of Access Panel For A Pump Cover?

Comparing The Costs Of Backflow Enclosures and Buildings

The Right Insulated Cover for Backflow Valve and Enclosure Heating

How to design & Buy a Pump Enclosure

Get the free, editable checklist.



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.