Mr. Max Ang engaged Water Plumbing Pte Ltd (“WP”) to supply and install the following items in his master bedroom:

(i) A storage heater,
(ii) A toilet bowl,
(iii) A basin,
(iv) A shower set, a bidet spray, and bathroom accessories.

The total fee was $10,000. The payment was to be made “net cash as the work proceeds and the balance on completion.”

Mr. Max Ang made two payments totaling $6,000.

One month later, WP had completed all the work and requested payment of the balance of $4,000.

Mr. Max Ang complained that WP’s work was deficient as the heating system did not heat adequately and gave out fumes.