The Content Of The Article:

Pivotable, a cast iron radiator provides regular heating thanks to its high inertia and radiation. It does not fear corrosion or overpressure and is suitable for all central heating installations. Purchased in flea market or recovered on the places of residence, he can return for many years.

Text J.P. Decroix - Photos C. Petitjean

In the first place, the existing accessories must be dismantled. Leaching from the outside of the radiator is required, as well as any stripping if the paint is degraded. The inside is cleaned by inserting into one of the holes the nozzle of a garden hose or an HP cleaner. Pressurized water will create turbulence that will loosen tartar and other accumulated sludge. Dirty water comes out through one of the opposite ports. Let dry and paint the appliance if necessary.

Review of details

A radiator has four accessories: at the top, a faucet and a trap; at the bottom, an outlet connection and a plug on the opposite side. When the tap is placed to the right, the trap is on the left and vice versa. Same for the bottom accessories.
● On a cast iron radiator, the holes are normally one inch (26 x 34 mm) female thread and the accessories for the male threads are significantly smaller, usually 1/2 "(15 x 21 mm). connection to a 14 x 16 mm copper network Easy-fit fittings for 1/2 "(1" x 1/2 ") female 1" male reduction radiators are readily available in specialty stores and GSBs There are also other gearboxes with different threads depending on the requirements, and an existing fitting can also be screwed down to suit the thread of the attachment.

In practice

Mount the "white" fitting in the radiator port. Do not force if you encounter resistance. Unscrew and clean the inside thread of the orifice with a wire brush to eliminate any waste that may damage the grouting product. Then grease the inner thread with sealing compound and wrap the bead around the male thread of the fitting. Screw the connections to the holes with a wrench, without forcing. On an existing fitting, apply the proper reduction using a special Allen key.
● Screw the various accessories onto their respective connections, not forgetting the grouting products. There are three types of faucets: manuals (the simplest), models designed to receive a thermostatic head later, and thermostats. These accessories are available in different models (straight body, right angle, inverted square...) and sizes (1/2, 3/4 inch...) to adapt to the configuration of the radiator inlet and piping.
● Automatic or manual, the trap is used to empty the air that accumulates during start-up and during heating seasons. It can have a swiveling jet 360° to more easily direct water to evacuate to a container. At the exit of the radiator, sevisse an elbow or a té of adjustment.
The latter makes it possible to compensate for the differences in flow between two radiators, and thus to balance the water temperature on the different devices of the installation. This adjustment tee also has the advantage of isolating them from all the pipes. This allows their disassembly without draining the installation, during decoration work.

Disassemble accessories and fittings

Disassemble accessories and fittings

Disassemble old accessories and fittings. If they are blocked, spray a lubricant or a little heat at the threads. Loosen with a wrench.

Clean and lubricate the threads

Clean and lubricate the threads

Clean the inside thread of the radiator and grease it with sealing compound. Then wrap the male thread of the fitting (in one go) in the direction of the screwing.

Screw the fitting

Screw the fitting

Screw the fitting to the adjustable wrench in one steady motion. At the end of the race, tighten completely without forcing. The tightening of all the nuts will be refined, if necessary, during the launch.

Seal

Seal

Traditional sealing of threads, tow and joint compound can be achieved with Teflon tape. Then make a few turns around the thread, in the opposite direction of the screwing.

Screw the accessories

Screw the accessories

This faucet is manual type square. Screw on the accessories, not to mention the grouting product. If necessary, a second key can be used to hold the fitting while tightening.

To place...

To place...

Trace the location of the 14 x 16 copper pipes, which will serve the radiator. Attach collars every 1 m. Place the hoses and hold them by lightly screwing the flanges.

... and assemble the pipes

... and assemble the pipes

The copper pipes are assembled according to the brazing technique. It requires a heating temperature of 600 to 900° C and a filler metal, such as a silver solder (6%).

Connect the tubes

Connect the tubes

The connections of the tubes on the tap and the radiator outlet are carried out either by the traditional method of the flanged collar, or with solder connections or quick couplings.

Fix the radiator to the wall

Fix the radiator to the wall

The fixing of a cast iron radiator on the load-bearing walls is carried out with three brackets: two placed at the top, the third at the bottom. The most powerful have feet, placed here on holds before tiling the ground.


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