How would the procedure: "patient recommended to drink more water" be encoded as a SNOMED expression (or a FHIR procedure?)
Are there public guidelines for encoding records? SNOMED's docs seem to be a little sparse on examples.
I would have expected a child concept of 229807004 |Recommendation to change food and drink intake (procedure)| for this.
Best solution is to request the concept from your SNOMED National Release Centre.
Failing that, or in the meantime, you could use this concept as-is, with text (eg in a CodeableConcept) indicating the additional detail ("drink more water").