Purge Calculator

Purge Performance & Job Calculator Why Flush, When You Can PURGE? ⚠ Important: Do not flush through compressors, TXVs, metering devices, filter-driers, capillary tubes, or other sensitive components. Isolate the line set before flushing. Always follow Vapco Purge application instructions, chase with dry nitrogen, and pull a vacuum to 500 microns or lower before charging […]

How To Flush Line Sets

By Elliot Garner How to Flush HVAC Line Sets: The 140+ PSI Gold Standard Protocol TL;DR — Key Takeaways Equipment manufacturers are not banning line set flushing — they are warning against weak, low-pressure flushes (≤55 PSI) that trap solvent and destroy replacement compressors. A proper HVAC line set flush requires 140+ PSI delivery pressure […]

News Archive

Why Your Wasp Spray Stops Reaching the Nest Halfway Through the Can

Most wasp sprays claim 20-foot range. That number is only true when the can is full. Here's the aerosol physics behind spray pressure degradation — and why consistent range throughout the full can matters for job site safety.

Professional Grade vs. Consumer Wasp Spray: What the Label Doesn’t Tell You

The wasp spray at Home Depot was built for a homeowner's porch. Here's what separates professional wasp spray from consumer formulas — active ingredient concentration, dielectric strength, indoor use ratings, and why it matters for contractors. If you've ever emptied half a can of Raid into a wasp nest and walked away wondering whether you actually killed anything, you already understand the difference between a spray that was formulated to sell and a spray that was formulated to work.

What Is Dielectric Wasp Spray and Why It Matters for Electrical and HVAC Work

Dielectric wasp spray uses a petroleum distillate carrier that resists electrical conduction near energized equipment. This guide explains ASTM D-877 testing, how field conditions reduce rated dielectric strength, and how to compare products by spec

Elementor #7712

Vapco Partner Network Vapco Partner Network We Got You Covered  ·  Since 1953 Join the Vapco Partner Network – Select Role –Branch ManagerC-SuiteCounter / Inside SalesMarketingManufacturer’s RepOutside SalesOwner / PrincipalPurchasing Manager Join the Partner Network → Loading… You’re in. Your Vapco rep will be in touch soon.Welcome to the Partner Network.  ·  Trade partners only […]

Why Refrigerant Grade Matters: AHRI 700 Certified R-290 and R-600a 

Not all R-290 and R-600a is the same product. Learn why refrigerant grade, AHRI 700 certification, and filling process standards matter — and what to ask your supplier.

R-290 and R-600a Refrigerant Service: What HVAC/R Technicians Need to Know 

R-290 R-600a Refrigerant Service:What HVAC/R Technicians Need to Know TL;DR R-290 and R-600a are already in new refrigeration equipment coming off the truck. Both are A3 hydrocarbon refrigerants — flammable, precise charge weights, different applications, not interchangeable. R-290 goes in commercial equipment, R-600a goes in household appliances. Always verify the nameplate. The most common mistake: […]

That Stain on Your Ceiling Tile Isn’t a Roof Leak — It’s Probably a Sweating Pipe

The spray-on coating — No Sweat (NS-1) by Vapco, is the professional standard for this application — dries to a hard white finish. In any space where the pipe is visible, it can be painted to match surrounding surfaces. Drop ceiling environments, finished basements, and mechanical rooms with visible pipe runs don't have to look like the insulation was an afterthought. A painted coating blends in. Foam wrap doesn't...