The G5 Tapeless Fittings™ are Analytically Correct™ in their design, eliminating the dead volume and required thread sealant that is common to NPT Fittings. G5 Fittings^™ are mated hand tight with standard NPT fittings and utilize an integral elastomeric seal that eliminates the need for thread sealant. This saves the amount of time that is currently spent applying/removing thread sealant to/from NPT fittings and also removes the potential for thread galling.