Use the lowest pressure that fully atomizes the coating. Start with the pressure control at minimum, raise it slowly while spraying a piece of cardboard, and stop when the pattern has no heavy edges, called tails. Lower pressure means less overspray, less tip wear and less strain on the pump. Re-test whenever the paint, tip or hose changes.
The rule: lowest pressure that atomizes
Titan's Impact 440 manual and Titan's own tip guidance agree on one rule: use the lowest pressure that atomizes the coating completely. Behr says the same thing from the coating side: the lowest pressure that gives a solid fan reduces overspray and extends the life of your equipment.
Pressure is not a quality dial. Turning it up past the point of complete atomization does not improve the finish. It adds overspray, wears the tip faster and puts more strain on the pump. The right setting is the first one where the spray works, not the highest one the sprayer can reach.
How to find your setting
Start with the pressure control at minimum
Prime the sprayer as your manual describes, with the tip guard and tip fitted and the gun locked when you are not spraying.
Spray a piece of cardboard
Pull the trigger on cardboard, not on the wall. Look at the edges of the fan.
Raise the knob slowly
Turn it up a little at a time and test again each time. Heavy edges, called tails, mean the paint is not fully atomized yet.
Stop when the tails disappear
The Impact 440 manual's test is a pattern with no heavy edges. Do not keep going to see if it gets better.
Test again after any change
A new paint, a different tip or a different hose changes the answer. Run the cardboard test again each time.
What too little and too much pressure look like
Reading the symptoms
| Setting | What you see | What it costs you |
|---|---|---|
| Too low | Tails or an hourglass pattern, coarse spray | Uneven coverage; Titan's Hydra M manual lists tails and hourglass patterns as inadequate delivery or a worn tip |
| About right | A fan with soft, even edges and no heavy lines at the sides | Nothing extra; the lowest setting that works |
| Too high | More overspray than the job needs | More overspray, faster tip wear and more strain on the pump (Titan, Behr) |
Tails at the lowest setting that used to work are a reason to check the tip and filters before turning up the knob.
Why the coating and tip change the answer
Pressure is only one part of a setup. The coating, the tip orifice and the sprayer's limits all decide what you need. Coating makers print a tip range and, sometimes, a pressure on each data sheet, and the examples show how much they differ:
- Sherwin-Williams SuperPaint interior lists 2000 psi with a 0.017 in. to 0.021 in. tip.
- Behr PRO i100 interior spray flat lists a 0.017 in. to 0.021 in. tip with a 60 mesh filter.
- Behr elastomeric masonry paint lists a 0.025 in. to 0.029 in. tip and equipment that delivers at least 2,500 psi at the tip.
Those are examples of how data sheets read, not settings to copy. Read the data sheet for your coating and compare it with your sprayer's limits. An Impact X 440 is rated to 3300 psi and a 0.023 in. maximum tip, so the elastomeric tip range above is outside it. The ControlMax 1700 is rated to 1500 psi and a 0.017 in. maximum tip. If the data sheet asks for more than your sprayer offers, the answer is a different sprayer or a different coating, not more knob.
Tip choice matters at the same time. Titan's guidance gives 0.017 in. for exterior house paints and interior wall paints, 0.019 in. for primers and 0.015 in. for solid stain. The tip number's last two digits are the orifice in thousandths of an inch, and the first digit times two is the fan width in inches at 12 in. from the surface. The airless spray tips page lists them.
HEA tips and lower pressure
High Efficiency Airless (HEA) tips are designed to atomize at about 1000 psi or lower, against about 2000 psi for conventional airless, according to Wagner and Titan. Titan states up to 55% less overspray, and says the lower pressure puts less strain on the pump and extends its life. Wagner's HEA page does not give a percentage, so treat the 55% figure as Titan's wording.
HEA comes on the ControlMax line and on RX-Apex HEA kits. The 0538077 RX-Apex gun, hose and TR1 HEA tip kit is one on the site. An HEA tip does not change the method: the cardboard test still sets your pressure.
When pressure is not the cause
Turning the knob up is the wrong move when the pattern is bad for another reason. Titan's troubleshooting pages list the same set of causes: a worn tip, a clogged pump filter, gun filter or inlet screen, a pressure knob set too low, or a tip too large for the pump. A worn tip has a wider orifice, so pressure falls and the pattern gets coarse and streaky.
Check the cheap items first: the inlet screen, the pump filter and the gun filter on the filters page, then the tip. If the cardboard test only passes with the knob turned far up, inspect the tip for wear. The gun, hose and tip kits and the guns and tips page list replacements, and a 695-517G tip and guard kit is a complete tip-and-guard swap. If you are not sure what fits your gun, call (713) 931-0006.
Tips, kits and sprayers mentioned above:
−16%
The Short Version
Start at minimum, raise the knob slowly, test on cardboard, and stop when the tails are gone. Re-test after any change of paint, tip or hose. Check the coating's data sheet for tip size, and look at the filters and the tip before you blame the pressure setting.
Tails that will not go away?
Call (713) 931-0006 with your sprayer model and the tip you are using and our parts team will help you find the filter or tip to check.
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