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Ultra-Lite MK3 Air Helmet Q & A

A. Our clientele base is primarily focused in the inshore industrial sector, and we are often asked to perform above water hazardous tasks using heavy and cumbersome diving gear.

A. In the fall of 2019, we were approached by an engineering firm that asked if we could work in a “live” sewer. The repair in question was 962’ into a 54-inch sewer.

During the pandemic downtime we were able to develop a system to safely travel this distance as well as engineer & build the Ultra-lite MK3.

A. Yes, we were able to complete the job on time and budget. This would not have been possible without the use of the MK3.

This was a very important job for the MK3 and Bulldog.

A. Working safely in a live sewer is very difficult. Being able to travel 1,000 feet in a live sewer and work, is far more difficult. Bulldog was able to accomplish this with confidence.

As there was no excavation or bypass our client was able to easily secure the necessary permitting.

This, I think was very significant to the client.

A. This was all organic. We were diving for a client, and they asked us if we could remove/install some above water industrial pumps that were sealed to a H2S source.

Every job we have done with the MK3 has occurred organically, while diving for a client.

A. I think each of these industries, municipal sewage and the myriad of hazardous conditions present in the industrial sector are a viable market for the MK3.

A. The MK3 is very versatile. It was designed for the sewer industry as a light-weight positive air helmet. With 2-way comms and the ability to seal it to a biohazard suit, the MK3 is an ideal tool for sewer work.

In the industrial sector it can be paired with Tyvek or Tychem suits when dealing with confined space h2s or other noxious gases.
When the need for full encapsulation is present it can be paired with a biohazard suit.

There are endless scenarios in the industrial sector for a system like this.


  • Penetration of most confined spaces, including dry or wet tunnels, with the potential for lack of oxygen or life-threatening gases.
  • Cleaning of many industrial wastes, including in confined spaces.
  • Changing valves, pumps, burst discs or other mechanical devices that may be associated with h2s or other hazardous gases.
  • Retrieval of equipment in contaminated spaces.
  • Hook up or seal of off gassing vats, closing of valves.
  • Potential for confined space rescue.

These are just a few of the situations that the MK3 could be utilized. Applications for the MK3 are still in a discovery stage.

A. No, not at this point.

A. No, it is too light to submerge below water.