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PVB Wrapping Technique to Winterize Your Irrigation System

Writer's picture: Beck Landscaping LLCBeck Landscaping LLC

When the Texas freeze arrives, protecting your irrigation system takes more than just turning off the water. At Beck Landscaping, we've proudly helped Houston-area homeowners safeguard their landscapes for over a decade. Here is our expert professional guide to winterizing your Pressure Vacuum Breaker (PVB) and avoiding costly freeze damage.


Materials Needed - Clickable links to the recommended Amazon products are included, just click on each listed item to access them directly!:



Step 1: Prepare the Insulation Pipe

  • Measure: Carefully measure the length of pipe and valve you need to cover, from top to bottom. Be sure to include any exposed fittings or connections.

  • Cut: Use a sharp utility knife or scissors to cut the insulation tube to the measured length. A clean, straight cut ensures a snug fit.

  • Test Fit: Before securing the insulation, slip it over the pipe and valve to ensure a proper fit. It should slide on easily but fit snugly without gaps.


Step 2: Secure the Insulation with Tape

  • Start at the top: Begin wrapping the insulation tape at the top of the pipe or component, just below where the insulation tube ends.

  • Overlap the tape: Wrap the tape in a spiral pattern, overlapping each layer by about half the width of the tape. This creates a secure seal and prevents gaps.

  • Work your way down: Continue wrapping the tape down the length of the insulation, maintaining a consistent overlap.

  • Finish at the bottom: End the tape wrap at the bottom of the pipe or component, ensuring the entire insulated area is covered.


Step 3: Set the Valves for Freeze Protection

  • Supply Valve: Set to CLOSED. This is the main valve that controls the flow of water from your main water line into your irrigation system. Make absolutely sure it's in the fully closed position. This prevents any new water from entering the system and potentially freezing.

  • Outlet Valve: Set to OPEN. This valve controls the flow of water to your sprinkler zones. Keep it open! This allows any water remaining in the lines to expand and escape through the bleed valves (which we'll cover in the next step). This prevents pressure buildup and protects your pipes from bursting.


Why This Matters

  • No New Water: Closing the supply valve ensures that no fresh water enters the system, which could freeze and cause damage.

  • Room for Expansion: Opening the outlet valve gives the remaining water in the lines room to expand as it freezes, preventing pressure buildup and potential pipe bursts.

  • Easy Drainage: With the outlet valve open, water can easily flow out through the bleed valves, further reducing the risk of freeze damage.


Protect Your Investment

Protecting your investment in your landscape is our priority at Beck Landscaping. By following these winterization steps, you can significantly reduce the risk of costly damage to your irrigation system and ensure your landscape thrives come spring.


Remember These Quick Tips:

  • Know your system: Familiarize yourself with the location and operation of your PVB, shut-off valves, and bleed valves.

  • Act before the freeze: Don't wait until the last minute! Winterize your system well in advance of freezing temperatures.

  • Consider professional help: If you're unsure about any of these steps or prefer to have a professional handle the winterization process, contact Beck Landscaping. We're here to help!


Stay warm, stay safe, and have a wonderful winter from all of us at Beck Landscaping!

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