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Shower Cyl  Hot Water Cylinders

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ShowerCyl hot water cylinders


Gravity hot water cylinder with mains pressure shower coil

Index Page > Hot Water Cylinders > ShowerCyl Hot water Cylinders

The clever way to enhance shower performance on a gravity hot water system without the need for a booster pump.

Gravity and mains pressure hot water from an open vented hot water cylinder

Mains pressure hot water systems are extremely popular these days, but they can prove to be a significant investment. The beauty of mains pressure systems is the performance you can expect to achieve (providing you have sufficient pressure and flow rate in the cold water main supply - see note below).

It's one thing to desire, it's another to be in a position to spend the money and prepared for the upheaval.

ShowerCyl - Hot water cylinder with mains pressure shower coil

The ShowerCyl cylinder is an interesting hybrid of a mains pressure and gravity pressure cylinders. The ShowerCyl is an open vented 'gravity' cylinder with all the  functionality you would expect, but with an additional heat exchanger fitted internally near the top which is dedicated purely to providing mains pressure hot water for a shower. (Similar to a shower take-off, but instead of drawing water from inside the cylinder it heats mains water passing through the coil.)

Gravity hot water cylinder with mains pressure shower take off

By installing a high efficiency mains pressure heat exchanger inside the cylinder in the top of the cylinder (where the hottest water is) and passing cold water through it (which is fed directly from your main) you produce mains pressure hot water in sufficient quantity to enjoy a high performance mains pressure shower (Please see note below) from it's own dedicated take-off on the cylinder.

 

The rest of your household hot water plumbing continues to operate under gravity conditions exactly as it did before.

ShowerCyl - the vented gravity cylinder that can supply mains pressure hot water to a shower

Having a mains pressure hot water supply to your shower could do away with the need to install a shower booster pump to increase performance (providing of course your mains pressure supply is adequate). In such a scenario it would of course be prudent to provide a mains pressure cold feed to your shower valve also - thus providing fairly well balanced supplies. (Shower equipment connected to a mains pressure feed should be of the 'thermostatic' type.)

(Note: The performance of a mains pressure system is entirely dependant on the pressure and flow of the incoming cold water main and is subject to the normal fluctuations in pressure, temperature and/or flow. Once installed a mains pressure supply cannot be boosted if you are subsequently unhappy with performance. To do so is in contravention of Water Bye Laws. With ShowerCyl the same rules apply to the mains pressure coil and associated output, but you are at liberty to continue doing anything you wish with the stored gravity hot and cold water in your system. Interestingly this leaves you the option of reverting back to your gravity stored water if for any reason you find yourself unhappy with performance which would then enable you to install a pump. For this reason, if no other, it might be considered wise to request a direct shower take-off when ordering your cylinder.)

 

The ShowerCyl is available in the following cylinder formats:

 

 

(Click the link to the relevant cylinder type)

 


The benefits and savings

  1. Mains pressure hot water from your gravity system from a dedicated shower take-off without comprehensive re-plumbing of your house.

  2. No need to worry about G3 Building Regulations or an annual service on the cylinder.

  3. Save money on the cost of 1) a shower booster pump (no need to buy a pump), 2) a Surrey Flange for your cylinder (a necessary component if you install a booster pump), and 3) a larger header tank for the loft (often required to cope with the higher demand for water created by the pump).

Please be advised, the ShowerCyl cylinder can produce enough mains pressure hot water for you to shower, it is not suitable as a cheap alternative for providing mains pressure hot water to your enture dwelling. If you like the principle of the system but would like to supply the entire house by this method you should look at the TORRENT range of cylinders on this website. The ShowerCyl by comparison has a limited output to the Torrent and is designed to cope with the lesser demands of a typical shower.

Combination ShowerCyl Hot Water Cylinders

An excellent application for the ShowerCyl cylinder is where a lack of loft space demands you use a combination cylinder (a cylinder with a built-in header tank). It is often observed that combination cylinders provide very poor pressure (because the head of water is so low) and that it is impossible to get a decent shower because of this.

A remedy one might attempt is to install a shower booster pump. This however is not advisable because the header section of the cylinder will empty so quickly you run the risk of the system going dry (not a good idea and not particularly practical).

It is possible with the ShowerCyl cylinder to provide a dedicated mains pressure hot water feed straight from the cylinder whilst leaving the rest of the system in normal gravity mode. (just a couple of things to note, ensure you have sufficient mains pressure and room enough for a cylinder of a suitable size to make this viable.)

Somebody offered to price match? Click here to read more.....

 

ShowerCyl Indirect - Vented cylinder with mains pressure shower coil heated via a boiler coil and optional immersion heater

SHOWERCYL INDIRECT hot water cylinders


mm

Capacity (litres)

inches

Price inc vat

1500 x 400

170

60 x 16

464.26

1200 x 450

162

48 x 18

410.76

1500 x 450

218

60 x 18

498.37

1800 x 450

265

72 x 18

605.48

       

1200 x 500

190

48 x 20

707.24

1270 x 500

215

50 x 20

808.27

1500 x 500

245

60 x 20

823.84

1800 x 500

273

72 x 20

875.04

       

1200 x 600

300

48 x 24

1075.69

1500 x 600

380

60 x 24

1175.73

1800 x 600

450

72 x 24

1352.78

DIRECT

 

 

 


 

ShowerCyl Direct - Mains pressure shower water, gravity hot water Heated by single electric immersion heater

SHOWERCYL DIRECT hot water cylinders to British Standard


mm

Capacity (litres)

inches

Price inc vat

1200 x 450

166

48 x 18

403.17

1500 x 450

222

60 x 18

488.04

1800 x 450

268

72 x 18

628.56

       

1200 x 500

193

48 x 20

661.48

1270 x 500

218

50 x 20

817.13

1500 x 500

248

60 x 20

712.69

1800 x 500

276

72 x 20

923.77

       

1200 x 600

305

48 x 24

966.49

1500 x 600

385

60 x 24

1143.53

1800 x 600

454

72 x 24

1320.58

All cylinders are compliant with Part L Building Regulations.

 

 

 

 


 

ShowerCyl E7 Direct - Heated by off-peak and boost element provides both gravity and mains pressure hot water for shower

SHOWERCYL  ECONOMY 7 DIRECTcylinders to British Standard


mm

Capacity (litres)

inches

Price inc vat

1200 x 450

166

48 x 18

482.52

1500 x 450

210

60 X 18

543.42

 

 

 

 

 


 

ShowerCyl E7 Indirect - Twin immersion heaters and a boiler heat exchanger to provide both gravity and mains pressure hot water

SHOWERCYL ECONOMY 7 INDIRECT CYLINDERS to British Standard


 

mm

Capacity (litres)

inches

Price inc vat

1200 x 450

162

48 x 18

545.74

1500 x 450

206

60 X 18

606.16

 

 


 


 

ShowerCyl DIRECT Combination - Built in header tank, heated by single immersion heater

SHOWERCYL DIRECT COMBINATION CYLINDER to British Standard


 

mm

Capacity (hot/cold)

inches

Price inc vat

1500 x 450

166/40

60 x 18

579.57

1800 x 450

210/40

72 x 18

622.73

 

 

 

 

 


 

ShowerCyl Indirect Combination model - built in header tank, boiler coil and optional immersion heater

SHOWERCYL INDIRECT COMBINATION CYLINDER to British Standard


mm

Capacity (hot/cold)

inches

Price inc vat

1500 x 450

166/40

60 x 18

620.15

1800 x 450

210/40

72 x 18

665.93

 

 

 

 

 


 

 

 

ShowerCyl E7 Direct - Built in header tank and two immersion heaters for use on off peak tarriff

SHOWERCYL DIRECT ECONOMY 7 COMBINATION CYLINDERS to British Standard


mm

Capacity (hot/cold))

inches

Price inc vat

1500 x 450

166 / 40

60 x 18

594.88

1850 x 450

210 / 40

72 x 18

639.35

 

INDIRECT

 

 

 


 

 

 

ShowerCyl E7 Combination Indirect - Built in header tank, twin immersion heaters (for Economy 7) and a boiler coil

 

SHOWERCYL INDIRECT ECONOMY 7 COMBINATION CYLINDERS to British Standard

mm

Capacity (litres)

inches

Price inc vat

1500 x 450

166 / 40

60 x 18

642.15

1800 x 450

210 / 40

72 x 18

725.34

 

 

 

 

 

Additions and optional extras

Options available at additional cost include:

 
 

Compression fittings (instead of threaded bosses)

12.00

 

Shower take-off

17.50

 

Additional Tappings (pairs)

18.00

 

Secondary return

12.00

 
 

Immersion Heater (Incalloy) 3kW alloy coated (corrosion resistant)

34.00

 

Drain valve (drain cock) [threaded boss included on cylinder]

7.50

     
 

Hi recovery boiler coil (pumped) - indirect model only

45.00

 

Super Recovery coil (Pumped)

poa

     
 

Ball valve and overflow (combination models - supplied loose - not installed)

15.00

 

Additional immersion boss (already supplied with two)

18.00

 

Gravity boiler coil with 28mm connections (Large bore for AGA, wood burner etc) - Indirect model only

78.00

(please add to stated price)

Positioning tappings (connections) to your specification does not normally attract a supplementary charge

     

When sizing a cylinder remember the stated dimensions do not include the thickness of insulation. You must add the thickness of insulation to the cylinder dimension to obtain the finished size. This is most important if the cylinder needs to pass through a doorway or access hatch. Make sure you have enough room to make connections and service immersion heaters.

Illustrations are for guidance only and should not be interpreted as an exact representation.

 

 

Regulations, installation and servicing

Mains pressure hot water systems that contain in excess of 15 litres of hot water under pressure are subject to Building Regulations (Section G3). Because the quantity of mains pressure hot water in the ShowerCyl system is below the 15 litre threshold at any given moment a cylinder of this nature does not present any issues under Building Regulations, it therefore does not require specialist installer, it does not require commissioning and certification and does not require an annual service. For these reasons it is permissible and entirely reasonable for any competent person to install one.

 

 

Gravity and mains pressure hot water from the same cylinder

 

 


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