Mueller Line Stoppers and Qualitech


Mueller and Qualitech mean Quality

Furmanite provides complete Mueller and Qualitech Line Stopper Services to the gas industry and beyond.  Mueller Line Stopper equipment is the original method of Line Stopping used within the natural gas industry.  Mueller’s “No Blo” steel-wedge technology provides safe and effective isolation of natural gas systems when other systems are limited.

Qualitech Line Stopper technology is a light weight, yet rugged system used to stop flow in pressurized natural gas systems up to 6″.  With pressure ratings from 100 – 300 PSI, the Qualitech Line Stopper line is an indespensible and dependible line of equipment within our field service group.

Furmanite’s Line Stopper Service Complement Gas Companies Service Crews

Furmanite can assist any gas company during a busy construction cycle by responding to your field demands for quick, reliable response for Line Stopper Service.

We offer the following.

  • Mueller Line Stops from 3/4″ – 12″
  • Mueller Line Stoppers are pressure rated to 500 PSI
  • Furmanite has been a Mueller Gas Division distributor for decades
  • We can supply Mueller Line Stopper fittings and Line Stopper field services
  • Furmanite owns complete sets of all Mueller “No Blo” equipment
  • Furmanite field technicians are DOT Operator Qualified trained for Pipeline Line Plugging and Hot Tapping Services
  • Furmanite Provied high pressure curb valve tapping service beyond the pressure rating of traditional hot tap equipment
  • We own and operate redundant sets of Qualitech equipment from 3/4″ – 6″

Unparalleled Line Stopper performance

Furmanite offers complete Mueller Line Stopper field services to gas distribution and pipeline contractors throughout the World.  Furmanite’s relationship with the Mueller Company dates back to the 1960′s.  We own and operate multiple sets of Mueller Line Stopper machines in each size and pressure class category.

Mueller Line Stoppers provide an alternate means for Line Plugging and their “No-Blo” technology provides the most fail safe, reliable, and time tested Line Stop method available when working on natural gas distribution systems.  As the original manufacturer of Line Stopper technology for the Gas Distribution industry, Mueller Line Stoppers have provided decades worth of successful field operations.

Furmanite offers Mueller Line Stops from 2″ – 12″ and to pipeline pressures of 500 PSI.  We are a Mueller Distributor for over 4 decades and are available to supply fittings, replacement parts, and machine repair to fufill customer needs.

Unique Capabilties

Furmanite also complements our Line Stop Contractor services with a complete line of Qualitech Line Stopper machines and fittings.  As the original manufacturer of this machinery dating back to the early 1970′s, we have a complete line of machinery that can perform mechanical line stops from 3/4″ – 6″.  We no longer manufacture the equipment but have it available for sale as a distributor.  The Qualitech equipment provides an effective means of line stopping pipe flow on systems up to 300 PSI.  Ideal for working in tight quarters and light weight enough to be hand transported to work areas.  It is just another reason our field service operations are the most diverse and capable in the industry.


Furmanite - 80 Years of Innovation & Counting

Leak Sealing process developed leak-sealing-developed_thumb 01/01/1920

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First DIY Leak-Sealing Kit old-furmanite-leak-sealing-equipment 01/01/1924

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Use of Furmanite Leak Sealing Kits leak-sealing-10 11/01/1926

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Technology Development leak-sealing-diagram 11/22/1934

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Growing Furmanite purchase-letter_thumb 05/01/1960

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New Direction New-Technology_thumb 01/01/1966

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Best in the business were called NASA---Discovery-Team_thumb 09/01/1988

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Start of Modern Furmanite company-overview 11/22/1991

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Acquisition-GSG Division Acquisition-GSG-Division_thumb 01/13/2006

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Acquisition of SLM Acquisition-of-SLM_thumb 04/13/2011

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