What pressure should be used for plain & pre-glued dowel pins?
Generally, 10-20 psi is all that is needed for water to activate pre-glued dowels. If you have been using glue previously you may need to decrease the time that the glue valve is open to get a small enough amount of water. A good rule of thumb with glue is the higher the pressure the better. Higher pressures will help the glue nozzles clean themselves. When they are kept clean they will perform much better. This is one exception to this rule: if you can’t get a small enough amount of glue at a higher pressure you may have to turn down the pressure to avoid getting too much glue.