A 3-way load system lets you refill this Ingersoll Rand cordless grease gun in the manner that is most-convenient to you and your operations. Whether you choose to use a filler pump, hand load, or by simply pop in a new pre-loaded canister, all methods are quick and easy, to help reduce down time and improve efficiency. The included pressure relief valve is factory preset to relieve pressure over 6500 psi.