# Tri-clamp dip-tube caps: 1½ and 2 in, ⅜ in tube 6 to 24 in long > How do I pull liquid out of the bottom of a tri-clamp vessel from the top? - Category: Hardware › Sanitary clamp fittings - Kind: Hardware - Basis: Xem Studio design: the standard solid cap with a ⅜ in (9.53 × 1.2 wall) dip tube below and a ⅜ in hose barb (14MPHR barb profile) above - Page: https://xemstudio.com/objects/tri-clamp-dip-tube-caps/ · JSON: https://xemstudio.com/api/geometry?object=tri-clamp-dip-tube-caps · Plain text: https://xemstudio.com/objects/tri-clamp-dip-tube-caps/sheet.txt - License: dimension sheet CC BY 4.0 (Xem Studio); linked files under their publishers' licenses - Use in every chat: add https://xemstudio.com/mcp as a connector (https://xemstudio.com/use-with-ai/) **Exact dimensions.** True size, with no printing tolerance added. ## Notes - Transfer or sample from the bottom through the lid: push gas in another port and the liquid rises up the tube. For a 6 × 18 in vessel pick the 16 in tube (clears a dished bottom); 18 in reaches the floor. - Every clamp face is the ISO 2852 profile used across this site: 2.85 mm rim, flat face with the gasket groove (K 1.6 deep, R3 1.2 bottom, 23° walls, P2 0.8 edges) on C2, 20° back cone. Flange C3 / groove C2 / tube OD × wall, mm: ½–¾ in 25.0 / 20.4 (derived) / 12.7–19.05 × 1.65; 1–1½ in 50.5 / 43.5 / 25.4–38.1 × 1.65; 2 in 64.0 / 56.5 / 50.8 × 1.65; 2½ in 77.5 / 70.5 / 63.5 × 1.65; 3 in 91.0 / 83.5 / 76.2 × 1.65; 4 in 119.0 / 110.0 / 101.6 × 2.11; 6 in 166.9 (6.570 in) / 156.5 / 152.4 × 2.77; 8 in 217.7 (8.570 in) / 207.0 / 203.2 × 2.77; 10 in 268.5 / 261.0 / 254.0 × 3.40; 12 in 319.3 / 311.8 / 304.8 × 3.40. ## Sizes | clamp | tube_in | tube_mm | |---|---|---| | 1–1½ | 6 | 152.4 | | 1–1½ | 12 | 304.8 | | 1–1½ | 16 | 406.4 | | 1–1½ | 18 | 457.2 | | 1–1½ | 24 | 609.6 | | 2 | 6 | 152.4 | | 2 | 12 | 304.8 | | 2 | 16 | 406.4 | | 2 | 18 | 457.2 | | 2 | 24 | 609.6 | ## Where the files are - GW Kent: [Tri-clamp fittings guide: tube OD, flange OD and ID per size to 12 in; solid cap thickness](https://www.gwkent.com/triclamp-guide) — web — publisher's guide; dimensions cited - Dixon: [14MPHR brewery hose barb: A and barb OD B (hose ID + 0.040 in) per size, ½ to 6 in](https://www.cooneybrothers.com/userfiles/ad/documents/Dixon_Sanitary_14MPHRG600_Catalog.pdf) — PDF — publisher's catalogue; dimensions cited - Rubber Fab: [Tri-Clamp gasket dimensional chart: gasket ID, OD and bead diameter per size (2 in bead 2.22 in / 56.50 mm, 1.5 in 1.71 / 43.50, 3 in 3.29 / 83.50)](https://shop.andersonprocess.com/media/assets/product/documents/rubber-fab-tri-clamp-dimensions.pdf) — PDF — maker chart; dimensions are facts (verify at link) ## Free STEP/STL (10 parts, CC BY 4.0, Xem Studio) Index: https://xemstudio.com/files/hardware/tri-clamp-dip-tube-caps/index.json - dip-tube-cap-1.5in-6in: [STEP](https://xemstudio.com/files/hardware/tri-clamp-dip-tube-caps/dip-tube-cap-1.5in-6in.step) · [STL](https://xemstudio.com/files/hardware/tri-clamp-dip-tube-caps/dip-tube-cap-1.5in-6in.stl) — 1–1½ in cap with a ⅜ in (Ø9.53) dip tube 6 in below the face and a ⅜ in hose barb outside - dip-tube-cap-1.5in-12in: [STEP](https://xemstudio.com/files/hardware/tri-clamp-dip-tube-caps/dip-tube-cap-1.5in-12in.step) · [STL](https://xemstudio.com/files/hardware/tri-clamp-dip-tube-caps/dip-tube-cap-1.5in-12in.stl) — 1–1½ in cap with a ⅜ in (Ø9.53) dip tube 12 in below the face and a ⅜ in hose barb outside - dip-tube-cap-1.5in-16in: [STEP](https://xemstudio.com/files/hardware/tri-clamp-dip-tube-caps/dip-tube-cap-1.5in-16in.step) · [STL](https://xemstudio.com/files/hardware/tri-clamp-dip-tube-caps/dip-tube-cap-1.5in-16in.stl) — 1–1½ in cap with a ⅜ in (Ø9.53) dip tube 16 in below the face and a ⅜ in hose barb outside - dip-tube-cap-1.5in-18in: [STEP](https://xemstudio.com/files/hardware/tri-clamp-dip-tube-caps/dip-tube-cap-1.5in-18in.step) · [STL](https://xemstudio.com/files/hardware/tri-clamp-dip-tube-caps/dip-tube-cap-1.5in-18in.stl) — 1–1½ in cap with a ⅜ in (Ø9.53) dip tube 18 in below the face and a ⅜ in hose barb outside - dip-tube-cap-1.5in-24in: [STEP](https://xemstudio.com/files/hardware/tri-clamp-dip-tube-caps/dip-tube-cap-1.5in-24in.step) · [STL](https://xemstudio.com/files/hardware/tri-clamp-dip-tube-caps/dip-tube-cap-1.5in-24in.stl) — 1–1½ in cap with a ⅜ in (Ø9.53) dip tube 24 in below the face and a ⅜ in hose barb outside - dip-tube-cap-2in-6in: [STEP](https://xemstudio.com/files/hardware/tri-clamp-dip-tube-caps/dip-tube-cap-2in-6in.step) · [STL](https://xemstudio.com/files/hardware/tri-clamp-dip-tube-caps/dip-tube-cap-2in-6in.stl) — 2 in cap with a ⅜ in (Ø9.53) dip tube 6 in below the face and a ⅜ in hose barb outside - dip-tube-cap-2in-12in: [STEP](https://xemstudio.com/files/hardware/tri-clamp-dip-tube-caps/dip-tube-cap-2in-12in.step) · [STL](https://xemstudio.com/files/hardware/tri-clamp-dip-tube-caps/dip-tube-cap-2in-12in.stl) — 2 in cap with a ⅜ in (Ø9.53) dip tube 12 in below the face and a ⅜ in hose barb outside - dip-tube-cap-2in-16in: [STEP](https://xemstudio.com/files/hardware/tri-clamp-dip-tube-caps/dip-tube-cap-2in-16in.step) · [STL](https://xemstudio.com/files/hardware/tri-clamp-dip-tube-caps/dip-tube-cap-2in-16in.stl) — 2 in cap with a ⅜ in (Ø9.53) dip tube 16 in below the face and a ⅜ in hose barb outside - dip-tube-cap-2in-18in: [STEP](https://xemstudio.com/files/hardware/tri-clamp-dip-tube-caps/dip-tube-cap-2in-18in.step) · [STL](https://xemstudio.com/files/hardware/tri-clamp-dip-tube-caps/dip-tube-cap-2in-18in.stl) — 2 in cap with a ⅜ in (Ø9.53) dip tube 18 in below the face and a ⅜ in hose barb outside - dip-tube-cap-2in-24in: [STEP](https://xemstudio.com/files/hardware/tri-clamp-dip-tube-caps/dip-tube-cap-2in-24in.step) · [STL](https://xemstudio.com/files/hardware/tri-clamp-dip-tube-caps/dip-tube-cap-2in-24in.stl) — 2 in cap with a ⅜ in (Ø9.53) dip tube 24 in below the face and a ⅜ in hose barb outside ## Questions **Which length for a 6 × 18 in vessel?** 16 in clears the dished bottom; use 18 in only with the round bottom. ## Fits with - [Tri-clamp vessels with a dished or round welded bottom: 4, 6 and 8 in, 12 to 24 in deep](https://xemstudio.com/objects/tri-clamp-dished-bottom-vessels/) - [Tri-clamp end caps with ports: NPT, clamp nozzle, hose barb and airlock hole, 1½ to 8 in](https://xemstudio.com/objects/tri-clamp-ported-end-caps/) - [Tri-clamp racking arm: 1½ in clamp body and ½ in arms, 2 to 6 in reach](https://xemstudio.com/objects/tri-clamp-racking-arms/)