Encase™ Acid Waste Polypropylene

Encase™ Acid Waste Polypropylene


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Easy-to-install, safe & reliable

The IPEX Encase™ system uses polypropylene pipe, inside and out, for high corrosion resistance over a broad temperature range. At the heart of our patented Encase™ polypropylene system is its electrofusion fitting with a heavy-gauge resistance wire integral to the socket. The resulting system offers reliable joints and a considerable reduction in installation times.

Product overview

Encase™ is a premier system that offers safe containment and transportation of harsh acid waste. These systems are commonly used in industrial applications such as:

  • Industrial plants
  • University Laboratories
  • Hospitals
  • Pharmaceuticals facilities
  • Chemical manufacturing
  • Food Processing

Features & benefits

  • Excellent chemical and corrosion resistance
  • Drainage pattern fittings: Ensures smooth chemical flow
  • Wide temperature range up to 180°F
  • Fast, reliable, and repeatable joining method
  • Compatible with Centra-Guard low point leak detection


The specification section covers the details you need for your project.

Material: Polypropylene
Carrier:  1-1/2″ – 8”
Containment: 4″ – 12″

Manufactured in both non-flame retardant as well as flame retardant material for above-ground installation.



Pipe, fittings, internal pipe supports, and anchor plates shall be manufactured from Type 1 homopolymer or Type 2 copolymer polypropylene material as described in ASTM D4101.

All pipe fittings shall be factory assembled and of unitized construction, with the primary and secondary components integrally anchored together to prevent movement of the primary pipe/fitting within the containment pipe/fitting. All piping components shall be manufactured to Schedule 40 dimensions.

The primary pipe shall be adequately supported by means of support plates welded to the primary pipe. Anchor plates shall be provided at each end of the pipe/fitting section to restrain pipe expansion. All anchor plates must be mechanically located in a machined recess on the inside of each secondary pipe/fitting and welded to both the primary and secondary pipe/fitting sections.

All factory joints shall be made either by butt fusion or Enfusion. Joining by means of fillet welding is expressly forbidden.

All site joints shall be made using Enfusion couplings, manufactured from polypropylene with a nickel/chrome resistance wire, molded in place. Components with copper wire elements are prohibited. Solvent, buttwelded, or fillet-welded site joints are also prohibited.

Installation shall be in accordance with the contract drawings, the manufacturer’s recommendations, and the local plumbing code. The entire installation shall be installed in proper alignment and free of stress.

The system shall be tested in accordance with the manufacturer’s recommendations and the local plumbing code. The primary pipe shall be tested prior to making the secondary joints. If a secondary pipe cannot be hydro-tested, as determined by the engineer or authority having jurisdiction, then the use of nitrogen or air at a MAXIMUM 5 psi (gauge) shall be allowed. It is imperative that a working-pressure regulator be used during the pneumatic test to ensure that over-pressurization of the PVC, beyond 5 psi, cannot occur.

The following must also be noted: Air or nitrogen under pressure is compressed and therefore poses a potential hazard. If a failure of the pipe or fitting occurs during a such test, the air exits at the failure point and expands rapidly. This increase in velocity can cause the system to fail in a catastrophic mode. Therefore during such an air test all personnel involved in the test or present in the test surrounding area must be aware of such a possibility and take all necessary precautions. Precautions include, but are not limited to, taking extreme care not to impact or damage the system in any way. Such procedure is a limited exception to IPEX standard policy which forbids the use of its rigid systems with any compressed gases.

Installation and testing shall be in accordance with the contract drawings, the manufacturer’s recommendations, and the local plumbing codes. Testing with compressed air is prohibited. The entire system shall be installed free of stress and in proper alignment.

Horizontal supports shall provide a wide bearing area and be free of burrs or sharp edges. Support spacings shall be in accordance with the manufacturer’s recommendations and local plumbing codes. Vertical piping has riser clamps on each floor. Pipe supports should be installed so that horizontal piping is in uniform alignment and with a uniform slope of at least 1/8″.

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