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What is the minimum distance between ProPress fittings?

Posted on Tuesday, Nov 12, 2019 in PVFundamentals

The Viega ProPress System revolutionized the way pipes are joined by reducing connection time to 7 seconds or less and eliminating the need for burn permits and fire watches. As this method grows in popularity, we hear many questions about proper use. The most common question we are asked by customers is: What is the minimum distance between ProPress fittings?

Viega answers this important question in the Viega ProPress Systems Installation Manual. Essentially the distance depends on the size of the tube diameter. Please use the chart below to determine the minimum distance required between two Viega ProPress connections (sizes 1/2 in - 2 in) and Viega ProPress XL connections (sizes 2-1/2 in to 4 in.) Note that where the minimum distance is 0 it is particularly important to ensure the correct insertion depth of the tubing into each fitting. Failure to maintain the safe distance may result in an improper seal.

Tubing Diameter Minimum Distance (inches) Minimum Distance (mm)
1/2 in 0 in 0 mm
3/4 in 0 in 0 mm
1 in 0 in 0 mm
1-1/4 in 7/16 in 10 mm
1-1/2 in 5/8 in 15 mm
2 in 3/4 in 20 mm
2-1/2 in 5/8 in 15 mm
3 in 5/8 in 15 mm
4 in 5/8 in 15 mm

*Chart above shows the minimum distance between two ProPress connections.  For information on distances welding, soldering or brazing near existing ProPress fittings, read our blog post,  How close can I weld, braze, or solder near a ProPress fitting? or for information on the distance requirements when pressing connections near existing soldered or brazed fittings, read our blog post, What is the minimum distance for ProPress fittings near existing brazed or soldered fittings?


As an authorized distributor of Viega, Cooney Brothers stocks a wide variety of fittings for ProPress Copper, ProPress Stainless, MegaPress Stainless, and MegaPress Carbon Steel. Shop over 1100 Viega products on our website or learn more about the Viega press methods here.