Detailed Breakdown on the Proper Installation of an Amalgam Separator on a Dry-Vacuum Pump  Step 3- Fittings

Detailed Breakdown on the Proper Installation of an Amalgam Separator on a Dry-Vacuum Pump Step 3- Fittings

This blog will discuss choosing the appropriate fittings to complete your installation. Thank you for following our Blog Series on the in-depth look at the proper installation of a M.A.R.S LibertyBOSS on a Dry-Vacuum system.


Step 1- Location Part 1 of this Blog Series spoke about where in the mechanical room you will locate the inlet pipe from chairs and determine the appropriate approach to an installation based on its location.

Step 1– Location Part 2 discussed where amalgam separators belong in the evacuation line system, common mistakes made by Non-C.A.S.S. Service Technicians and space-saving installation tips.

Step 2 – Hose illustrated the importance of choosing the right evacuation hose for your amalgam separator installation.

Now that we have selected the hose we will be using for the installation; we will have to decide on the appropriate fittings to complete our installation.


Choosing the correct fittings for an installation is where the average person gets the most frustrated, as there are multiple right choices in fittings to get the same result. Hopefully, this blog will offer some simple suggestions, which will make the process easier.

Quick Disconnects

For a NO Filter amalgam separator like the M.A.R.S LibertyBOSS, quick disconnects provide the ease of a rapid change out at the end of the system’s service life. One end of the quick disconnect will be attached to the inlet or outlet of the LibertyBOSS, the other end of the quick disconnect will be connected to the inlet or outlet hose. The quick disconnect allows for an installation to be completed with minimal tools. M.A.R.S recommends installing a LibertyBOSS using 1 ½” quick disconnects.

Depending on the application; a Camlocks or Unions type quick disconnects can be used. Camlocks are preferred by M.A.R.S, as they are user-friendly and offer a speedier installation. Unions are suitable for applications where there might be a hard pipe or tight installation. Unions allow an amalgam separator to be slipped in and out of position without disturbing the inlet or outlet hose or pipe.

Glue vs. Barbed

Once you have the one end of your quick disconnect attached to the inlet or outlet of the LibertyBOSS, you will need a hose fitting that will allow you to attach the opposite end of the quick connect to the appropriate hose.

You can choose to use either a barbed fitting that will be inserted into the Flexible PVC hose or glue a socket threaded male adapter over the hose. Both methods of attaching a fitting to a hose are acceptable, provided you purchased the appropriate fitting to match the diameter of your tubing.

It has been M.A.R.S’ experience that barbed fittings allow for flexibility with different styles of flex hose and offer a perfect result for the lowest cost of material.



A safe choice of material for the fittings used in an amalgam separator installation is Polypropylene for barb fittings and Sch 40 PVC for everything else. These materials are cost effective and are made to withstand the strain of a dental evacuation system.

step 4 fittings


Fittings Tips

– Use plumber tape on all threaded fittings and NOT plumber putty (tape offers a clean, watertight seal, plumber putty does not allow fittings to be changed out easily)

– For every barbed fitting, use a hose clamp to keep it in place

– Try to use the least amount of parts as possible (multiple parts can add restrictions in the pipe and add additional points of failure.)

– Avoid as many 90 degree elbows as possible

– Use wyes instead of tees (tees have 90 degrees, wyes do not)

– Try to use reducer fittings instead of bushings. (Reducer fitting shrink the diameter gradually. Bushings are a sudden reduction, which increases the chance of clogging.)

– Rubber couplers offer a quick and easy fix when transferring from one type of pipe material to another (example from coupler to Flexible PVC)


Step 4 – Planning

Now that we have reviewed both the appropriate hose and fittings to use during an amalgam separator installation, we can begin to plan out each step of our installation. The next blog will be giving simple pointers that will allow your amalgam separator installation go smoothly.

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