The plumbing scope on a data centre

DC plumbing is four distinct scopes wearing one label:

  • Potable water — the incoming main and internal distribution to pantries, toilets, showers, and domestic water storage. This is the certified-product scope.
  • Sanitary and waste — soil, waste, and vent (SWV) pipework from the fit-out areas.
  • Rainwater and storm drainage — roof and podium drainage, often UPVC underground runs to the site drainage network.
  • Process and cooling makeup water — the feed to cooling towers and water treatment plant, where the plumbing package hands over to the cooling package.

The trap is scale: because the package is small, it gets procured late and casually — and then an inspection rejects a potable line, or a makeup-water tie-in holds up cooling commissioning.

Material selection

Potable and pressure lines — HDPE PE100. Buried incoming services and distribution in PE100 HDPE pressure systems, selected by PN class against the design pressure. The PN12.5/PN16 selection logic (SDR, wall thickness, authority acceptance) is covered in PN12.5 vs PN16 HDPE pipes — read it before substituting classes. The published PE100 dimension schedule (20–630 mm, PN10/PN12.5/PN16) is on the HDPE spec table; confirm the PN class and SDR against the current catalogue before ordering.

Larger incoming mains — MSCL. Where the incoming main or yard piping runs to larger diameters, mild steel cement lined (MSCL) pipe to SPAN TS 21827 is the Malaysian waterworks standard — our range is SIRIM-certified, and the dimension schedule is on the MSCL spec table.

Drainage — UPVC underground. Sanitary discharge, rainwater leaders, and estate drainage in UPVC underground drainage & sewerage systems — the standard SIRIM-certified solution for Malaysian building drainage.

Stainless steel — where the specification calls for it: water treatment plant, process lines, and premium potable runs in plant rooms.

SIRIM / SPAN certification context

The potable scope is where certification stops being a preference. Water authorities and consultants check SIRIM certification on potable and drainage plastics at inspection, and steel water mains fall under SPAN technical standards (SPAN TS 21827 for MSCL). The full picture — what certification verifies, when non-SIRIM ranges are legitimate, and how to check delivered pipe — is in SIRIM vs non-SIRIM pipes.

The working rule from that article applies directly here: if there is an inspection, assume certification is checked. Confirm acceptance with the authority having jurisdiction, and ask us to state certification status per line in the quotation. For the wider waterworks compliance context, see the water reticulation page.

Specification checklist

  • Potable-line certification (SIRIM) confirmed per product line
  • PN class per pressure line matched to design pressure (see PN12.5 vs PN16 guide)
  • Incoming main material per water-authority requirement (HDPE / MSCL)
  • Drainage system per spec — UPVC underground vs internal SWV not mixed
  • Fittings and joints from the same system as the pipe
  • Makeup/process water interface with the cooling package coordinated
  • Certification documents requested in writing with the quotation

Buying the plumbing package from Sanifix

Sanifix supplies HDPE (pressure) systems, MSCL pipes (SIRIM, SPAN TS 21827), UPVC underground drainage & sewerage, and stainless steel pipes & fittings for DC plumbing packages. Send your plumbing BOQ for a line-by-line quotation across all four systems — with certification status stated per line. All four DC trade packages are covered on the data centre page.