Two reactors are supplied with #25 Ace-Thred that accepts 89058-890 PTFE adapter (#25 to #7 Ace-Thred) or 89052-692 (#25 to 3/8" NPT)

The former is for use with 89051-130 nylon bushing; the latter is suitable for use with 89077-514 tubing adapter with 3/8" NPT. Both are used to secure tubing from tank via an o-ring compression seal. The only adjustment in Apparatus II is the addition of an aluminum spacer-adapter, 89058-910, that threads onto the slotted bottle screw clamp located at top of the bottle guard. This adapter butts against the #25 PTFE adapter on top of the reaction vessel, and may be purchased separately to allow use of ACE vessels with your existing Parr unit.