Pressure drop is similar for both
PEX Sliding Fittings and crimp fittings have similar pressure drops. The internal design affects flow resistance. Both fittings cause minimal pressure loss. Example: a 1/2-inch fitting has a negligible drop.
Fitting internal geometry
The internal diameter of both fittings is similar. The pipe inserts fully into both fittings. This minimizes flow restriction. PEX Sliding Fittings have a smooth internal bore.
Flow resistance factors
Pressure drop depends on flow rate and fluid velocity. Higher flow rates increase pressure drop. Smaller diameters cause more restriction. PEX Sliding Fittings have comparable resistance.
Crimp fitting internal design
Crimp fittings have a barb that slightly restricts flow. The pipe is compressed around the barb. This creates a small pressure drop. PEX Sliding Fittings have less internal restriction.
Sliding fitting internal design
Sliding fittings have a smooth internal bore. The pipe passes through without significant restriction. PEX Sliding Fittings offer smooth flow.
Example: 1/2-inch fitting comparison
A 1/2-inch sliding fitting has a 0.5 psi drop at 5 gpm. A crimp fitting has a similar drop. Both are negligible. PEX Sliding Fittings are efficient.
Example: 3/4-inch fitting comparison
A 3/4-inch sliding fitting has a 0.3 psi drop at 10 gpm. A crimp fitting has a similar drop. Both are efficient. PEX Sliding Fittings are comparable.
Example: high-flow systems
In high-flow systems, pressure drops add up. Sliding and crimp fittings perform similarly. PEX Sliding Fittings are suitable for high-flow applications.
Pressure drop in long systems
Many fittings in a system increase total pressure drop. Each fitting adds a small loss. PEX Sliding Fittings contribute equally.
Design considerations
Designers must account for pressure drop. Fitting type has minimal impact. PEX Sliding Fittings are efficient.
Manufacturer data
Manufacturers provide pressure drop data. Check specifications for exact values. PEX Sliding Fittings data is available.
Final pressure drop summary
PEX Sliding Fittings and crimp fittings have similar pressure drops. Both fittings cause minimal flow restriction. Sliding fittings have a smooth internal bore. Crimp fittings have a slight barb restriction. In most systems, the difference is negligible. PEX Sliding Fittings are efficient for all applications. Example: choose either fitting type for similar pressure drop performance.