La Marzocco 'GS-3' 1/4" BSP x 3/8" Compression 150 cm NSF Stainless Steel Supply Hose compact-parts/compact-pump-and-motor Borosilicate glass contains boron trioxide

Borosilicate glass contains boron trioxide so it is very adaptable to thermal expansion meaning it won't crack under extreme temperatures like regular glass making it the perfect material used in Siphon Coffee Makers

built these around durable carbon steel rather than ceramic

and Piero Group Caps ensure water never leaves the coffee boiler during the brewing process

it eases piston travel and prevents the gaskets from rolling out of their grooves during reassembly

La Marzocco 'GS-3' 1/4" BSP x 3/8" Compression 150 cm NSF Stainless Steel Supply Hose compact-parts/compact-pump-and-motor Borosilicate glass contains boron trioxideLa Marzocco 'GS 3' 1 4" BSP x 3 8" Compression 150 cm NSF Stainless Steel Supply Hose This 150 cm stainless steel supply hose connects 1 4" BSP on the machine side to a 3 8" compression fitting on the plumbing side a convenient configuration for hooking up to standard US water supply lines. La Marzocco's part number is L326. SPECIFICATIONS 1 4" BSP x 3 8" Compression 150 cm length NSF approved, stainless steel COMPATIBILITY Fits: La Marzocco GS 3