Parker’s TrueSealTM thermoplastic push fit fittings are lightweight, field attachable and quickly connect to tubing without the use of tools. TrueSeal is ideal for water treatment and harsh chemical environments. Parker's TrueSeal push-in tube fittings are manufactured from FDA compliant materials and are NSF-51 listed for contact with food. Gray acetal fittings meet NSF-61 requirements for potable water.