Technical & Operational FAQ Directory

Single-size plugs (such as Plugline Single-Size Blocking Plugs) are engineered for precision contact and higher back-pressure ratings up to 14.5 bar in exact pipe diameters (e.g., DN100 or DN150). Multi-size inflatable plugs (e.g., 100–200mm or 600–1200mm) utilize high-stretch Kevlar-reinforced natural rubber to seal across varying pipe diameters and irregular pipe cross-sections. For active flow diversion, choose multi-size bypass plugs equipped with internal threaded flow-through ports.

Safe back-pressure hold is directly related to pipe diameter, pipe wall material (PVC, vitrified clay, concrete, HDPE), surface friction, and inflation pressure. Never exceed the marked maximum inflation pressure on the plug identification plate. Always brace plugs securely when testing with pneumatic air or water head, and reference the Drainchem Back-Pressure Sizing Chart before testing.

Standard natural rubber (NR) plugs are engineered for municipal sewage, stormwater, and water mains. For industrial lines containing hydrocarbons, oils, or harsh chemicals, Drainchem supplies specialized Nitrile (NBR), Neoprene, or chemical-resistant elastomer plugs. Contact our technical team for custom compound compatibility.

StoneAge® Warthog® nozzles (such as WV-1/4, WT-3/8, WS-1/2, WH-3/4, WG-1, and WGR Magnum) must be custom-jetted to match your pump’s exact operating pressure (bar/psi) and flow rate (lpm/gpm), as well as hose diameter and run length. Incorrect nozzle sizing can cause pump cavitation, pressure relief valve tripping, or reduced pulling torque. Drainchem custom-jets your nozzle before dispatch using factory certified StoneAge® calculation matrices.

Viscous rotation fluid in Warthog heads slows down rotation speed to allow the high-pressure water jets maximum dwell time to cut through roots and scale. Fluid levels should be inspected every 40–50 operating hours, and fluid changed every 100 hours or whenever rotation becomes erratic. Drainchem stocks genuine StoneAge® viscous fluid and overhaul seal kits with express Australia-wide dispatch.

For dense tap roots and tree root intrusions, use a controlled-rotation Warthog nozzle equipped with hardened forward-cutting front jets to bore through the core, followed by side jets to mill pipe walls. For heavy grease and fatbergs, high-flow flushing nozzles with 15° to 30° rear thrust angles paired with high-volume pumps provide maximum flushing and sweeping extraction power.

Vaporooter® is an APVMA-registered herbicide formulation that must be applied using a specialized foam generator machine. The dense foam fills 100% of the pipe barrel, penetrating joints, junctions, and top-of-pipe root intrusions that liquid chemicals miss. It must remain in the pipe for the recommended contact dwell time without immediate high-velocity water rinsing.

Yes. Vaporooter® is non-corrosive to clay, PVC, ductile iron, and concrete infrastructure. It targets root cell growth locally at the pipe joint without harming trees above ground, and breaks down safely in municipal sewer systems without disrupting biological digestion at municipal wastewater treatment facilities.

We maintain extensive stock across Australian warehouses (Melbourne, Sydney, Brisbane). Urgent emergency orders placed before 2:00 PM AEST qualify for same-day dispatch via priority air freight or direct hot-shot road courier to job sites and council depots across all Australian states.

All calibrated pressure testing gauges, test manifolds, and relief valve assemblies supplied by Drainchem are certified to Australian Standards (AS/NZS) and can be supplied with NATA-traceable calibration certificates for municipal hand-over and compliance documentation.