US · guidance
CMS SOM App. H, Tag V231
ANSI/AAMI RD52:2004 Requirements as Adopted by Reference 42 CFR 494.40(a)
5.4.4.2 Acid concentrate mixing systems: empty completely/prevent corrosion
Acid concentrate mixing tanks should be designed to allow the inside of the tank to be
completely emptied and rinsed according to the manufacturer’s instructions when
concentrate formulas are changed.
Page 90 of 420
Acid concentrate mixing tanks should be emptied completely before mixing another batch
of concentrate.
Because concentrate solutions are highly corrosive, mixing systems should be designed and
maintained to prevent corrosion.
Interpretive Guidance § 494.40(a)
ANSI/AAMI RD52:2004
5.4.4.2 Acid concentrate mixing systems
Use of a tank with a sloping bottom that drains from the lowest point is one means of facilitating
this process.
Additional Guidance:
Facility policy and practice must ensure the tank is completely emptied between mixing batches
of concentrate.
Facilities should maintain the system clean and free of spills of concentrate to reduce the
potential of corrosion.
History
Rev.
Provenance
- Source
- cms.gov
- Retrieved
- 2026-07-22
- Edition
- som-2026-07-22
- Content hash
54528233cb9a23cbd027c33682fb95b72be37983682198b347ef472fb6503a3d
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