[Brent Deines]

I'm not sure I can add anything to what SGT has already said, but I will put it in my own terms.

Resin above point B does not increase pressure, but you do want the resin level just slightly above point B due to the fact that as the break is filled with resin and the air removed, the resin level in the seal will drop. When the plunger is placed in the vacuum position it allows reserve resin from above point B to refill the seal.

In order to get the best possible repairs from the Delta Kits I-100 the seal must always be full when the plunger is in the vacuum position. This it what makes it operate on a true hydraulic basis, and is one of the key factors that separates it from all other systems.

I do use just a little more for extreme vertical applications, but on most repairs I use about the same amount of resin as SGT, and rarely ever have to add more. It only takes 2-3 drops to fill the seal, but we recommend 7 drops (just above the radius of the tip of the glass dropper) to compensate for vertical applications and to assure there is enough resin to re-fill the seal during each vacuum cycle. Any more than that is wasting product.