Eccentric reducer, flat on top (FOT)
ISO 10628-2 (groups 24-25, fittings and piping) / PIP PIC001
Drawn as
A trapezoid with a flat top edge and a sloped bottom edge, so the two pipe centrelines are offset. Often marked "FOT".
Meaning
Eccentric reducer with the flat side up. Standard on pump suctions so no vapour pocket can form. Sizes are written beside it.
Variants
- The flat side may be marked only by the text FOT, with a concentric-looking symbol