Water Regulations apply to all sports clubs - guidance can be found here:
https://www.wras.co.uk/downloads/public_area/publications/general/sports_grounds.pdf/
Clubs should check the guidance and ensure they are compliant as regulations may have changed since they had their irrigation systems and clubhouse plumbing systems installed. Inspections may be undertaken and this will avoid having to carry out work at short notice in order to comply and avoid enforcement action.