NoTap® Pipe Blocking

NoTap^® pipe blocking is a complete system for easily and economically repairing pipes and installing or replacing equipment in your pipe system, without having to drain the system first. Sections of pipe to be worked on can quickly be temporarily isolated by means of internally blocking the pipes with inflated balloons.

The NoTap method can be used for hot water, fresh (tap) water, compressed air and refrigerants (glycol and salt based solutions). It is suitable for all pipes of metal, for example: black steel, painted steel, galvanized steel, stainless steal as well as copper. Valid for both thin-walled and annealed tempered pipe.

Blockings can be carried out on pipes up to DN50 (2") and connections up to DN300 (12").

10 Good Reasons to Use NoTap

No need to drain the system
No refilling or venting after work is completed
Easy installation—no soldering, cutting, or welding required
Compatible with all metal piping: black steel, painted steel, galvanized, stainless, and copper
Saves energy—no hot water needs to be drained
Suitable for hot water, fresh water, compressed air, and refrigerants (glycol and salt-based solutions)
Eliminates risks associated with heating equipment like welding and soldering
Less corrosion—no fresh, oxygen-rich water added
Environmentally friendly—no hazardous water drained
No drilling fragments enter the system

Advantages for the Contractor

Significantly reduced job time
Improved profitability—more jobs completed in less time
Solves complex installation challenges
Provides better service and solutions to customers
No chemical handling required for cooling system modifications

Advantages for the Property Owner

No disruption to tenants during pipe work
Tradespeople can continue working (e.g., dentists, hospitals)
Lower installation costs
Work can be done during regular business hours—no need for costly after-hours labor
Reduced corrosion increases system longevity
Lower risk of water damage from open faucets
Environmentally friendly solution

Key Applications

With NoTap you can carry out repairs and branch connections without first draining the system. You will save a lot of time and money and the method is simple!

Installing and replacing valves and pumps

Are you replacing a valve, pump or mixing valve in a system? Try our method of pipe blocking on each side of the valve or pump first. Then do your replacement with ease.

Repairing leaks

Do you have a pipe that is leaking? Try our method of blocking on each side of the leak. Then repair the leak quickly and easily.

Installing heat pumps, boilers and heat exchangers

Use NoTap when you need to rebuild the heating system. The installation will go quicker by using our method of blocking and you will avoid problems with corrosion as no fresh, oxygen-rich water is added to the system.

Heating equipment

With NoTap you will totally avoid problems associated with heating equipment such as welding, soldering, etc.

NoTap Pipe Blocking Balloons

Blocking is done by inserting a balloon into a pipe by means of a hole drilled into the pipe through a mounted clamp and then inflating the balloon. The balloons come in four sizes, suited for different pipe dimensions. The balloons and tooling are color-coded to help select correct dimensions.

When the work is done, the balloon is removed and a sealed cap is mounted to the clamp.

Technical Data, Balloons

Media: hot water, fresh (tap) water, compressed air and refrigerants (glycol and salt based solutions). For other applications, contact us.
Ballon type	10-1	16-1	16-2	16-3
Plug color:	Grey	White	Black	Yellow
Pipe dims, Copper:	15,18, 22	28	35/36,42	54
Pipe dims, Steel:	DN10,15	DN20,25	DN32,40	DN50
Support tube:	10-1 grey	16-1 white	16-2 black	16-3 yellow
Max system pressure:	5 bar	5 bar	5 bar	3 bar
Min-Max system temperature:	10°-50°C	10°-50°C	10°-50°C	15°-40°C
Max blocking time at 30°C:	4 hours	4 hours	4 hours	1 hours
Max blocking time at 40°C:	2 hours	2 hours	2 hours	1 hour
Max blocking time at 50°C:	1 hour	1 hour	1 hour	–

Dimension Guides

Use the headings below for the correct dimension interval of pipe to be blocked. Go down to the table to find the exact dimension and article description that is needed for the blocking. See also the NoTap Guide for tables matching the correct dimension of pipe, drill size and clamp article numbers.

Clamps with check valves are always used when pipe blocking and even for smaller branch connections. For branch connections, use one of our connectors which have a collar that opens the check valve.

NoTap Balloon Kit 10-1

For pipe dimensions 14 - 23 mm

Colour code for these parts: Grey

Max system pressure 5 bar, Max system temperature 50°C

Pipe diameter (OD)	Drill diameter
14-17 mm, (Cu 15)	8.4 mm
17-19 mm, (DN 10/Cu 18)	8.4 mm
21-23 mm, (DN 15/Cu 22)	8.4 mm

NoTap Balloon Kit 16-1

For pipe dimensions 24 - 34 mm

Colour code for these parts: White

Max system pressure 5 bar, Max system temperature 50°C

Pipe diameter (OD)	Drill diameter
24-26 mm	14.4 mm
26-32 mm, (DN 20/Cu 28)	14.4 mm
33-34 mm, (DN 25)	14.4 mm

NoTap Balloon Kit 16-2

For pipe dimensions 35 - 49 mm

Colour code for these parts: Black

Max system pressure 5 bar, Max system temperature 50°C

Pipe diameter (OD)	Drill diameter
35-38 mm, (Cu 35)	14.4 mm
39-45 mm, (DN 32/Cu 42)	14.4 mm
46-49 mm, (DN 40)	14.4 mm

NoTap Balloon Kit 16-3

For pipe dimensions 50 - 60.3 mm

Colour code for these parts: Yellow

Max system pressure 3 bar, Max system temperature 40°C

Pipe diameter (OD)	Drill diameter
50-52 mm	14.4 mm
53-58 mm (Cu 54)	14.4 mm
55-60.3 mm (DN 50)	14.4 mm

NoTap - Pipe Blocking S1 (ENGLISH)

Showing the ease of Pipe Blocking with the SPXFLOW Tigerholm NoTap System, for S1 clamps with non-return valves