Search the forum,

bypass

A bypass is a road or highway that avoids or "bypasses" a built-up area, town, or village, to let through traffic flow without interference from local traffic, to reduce congestion in the built-up area, and to improve road safety. A bypass specifically designated for trucks may be called a truck route.
If there are no strong land use controls, buildings are often built in town along a bypass, converting it into an ordinary town road, and the bypass may eventually become as congested as the local streets it was intended to avoid. Petrol stations, shopping centres and some other businesses are often built there for ease of access, while homes are often avoided for noise and pollution reasons.
Bypass routes are often controversial, as they require the building of a road carrying heavy traffic where no road previously existed. This creates a conflict between those who support a bypass to reduce congestion in a built up area, and those who oppose the development of (often rural) undeveloped land. However, some of those in the bypassed city may also oppose the project, because of the potential reduction in city-centre business.

View More On Wikipedia.org
  1. davidwf

    what is this bypass for

    We have just moved in to a 12 year old house with a system comprising of a gas boiler with header tank and hot water cylinder also with header tank, there are no TRV's in the aiting cupboard around the 3 way valve is what appears to be some kind of bypass - highlighted in yellow - .... what is...
  2. gmartine

    Anybody been asked to tamper/slow or bypass meters?

    Extremely small sample (150) conducted by an insurance company would you believe... https://news.sky.com/story/ticking-time-bomb-over-widespread-meter-tampering-during-cost-of-living-crisis-12897023
  3. S

    Boiler bypass pipework – correct design?

    A plumber recently told me my bypass pipework is poorly designed as it’s offering a low path of resistance v the motorised valve T junctions, and therefore is passing water constantly. I have noticed that, some minutes after the CH starts up, this bypass pipe gets hot along its entire length up...
  4. J

    Do I need an adjustable bypass valve

    I now have a Main 18 HEAT ERP boiler which has its own bypass valve. Should I remove the existing external one to improver system flow?
  5. S

    Auto Bypass Valve OR Proportional Pressure pump mode – how to choose?

    I have read that an Auto Bypass Valve (ABV) is not compatible with a pump set to Proportional Pressure (PP) mode. I have a recently fitted Vaillant EcoFit Pure 430 heat-only boiler + Vaillant SensoComfort weather sensing controls + 15 rads (12 with TRVs) across 2 CH zones + a static bypass...
  6. B

    Add bypass to aid drain down?

    Hi, I'm about to do some replacement pipework under the floor and will need to drain down the system. No problem there. The drain valve is below floor level (external) on the return side of a two pipe system. Won't draining leave a lot of water in the flow side, below the radiator inlet...
  7. d36csr

    Installing smart TRVs on ALL radiators with use of a bypass valve

    Hi there, I recently bought a bunch of Drayton Wiser Smart TRV heads. I wanted to install them on all of my radiators so that I have full control of which radiators are on. However, it specifies in the instructions that one of the radiators should be left with 2 x open lockshield valves. Now...
  8. C

    Bypass Radiator messing up the heating in the house?

    Pardon my lack of explanation skills, I would try to summarise and make it comprehensive as much as I can. I hope someone can help or advice. I have a CH system with a combi boiler and a bypass radiator in the hallway. However the problem is the house is quite cold. I am in an end of terrace...
  9. S

    Auto bypass required ?

    Hi Guys I had UFH added to my extension, my system was a Baxi 30he with CH and unvented cylinder. The UFH has never really worked correctly first of all I noticed they had install the flow and return the wrong side of the circulation pump which I rectified myself as they have disappeared on...
  10. B

    Can I close my bypass rad if I keep another open?

    Sorry for stupid question but if you don't know you don't know. Can I turn off the 'bypass radiator" in the hall (has no TRV) as long as I keep another radiator, (any other, somewhere) open? Or is this bypass radiator somehow plumbed differently and must never be closed?
  11. K

    Vaillant ecoTec Sustain and an Automatic Bypass

    Hello all I hope you are well. This is my first Post here so..... I recently had a Vaillant ecoTec Sustain (Combi) installed under the ECO Grant Scheme to replace a 14 Year Old Ideal ISAR HE24. When the Ideal was installed in 2008 for my Mum there was also an Automatic Bypass (ABBV1) fitted...
  12. F

    Suspect boiler auto bypass

    If the auto bypass in my condensing boiler is stuck open will it cause a problem and/or significantly reduce the boiler's efficiency? I think the bypass is stuck open because the temperature of the bypass pipe is always the same as, or close to, the temperature of the boiler flow, when measured...
  13. F

    Automatic bypass Too many?

    Have a Vaillant Ecotec630 Plus 30kw lpg boiler year old fitted to UFH downstairs and 13 rads inc 5 towel rads all with TRVs The question is the boiler has an internal automatic by pass and one is fitted externally, but with UFH by default there is a bypass at the pump/manifold to the...
  14. R

    Bypass Valve on S-Plan Installation CH system

    Just a quick one folks. Should there be a bypass valve at the ringed location in the attached picture? Between the pump and the CH/HW valves? Thanks
  15. R

    CH with Microbore bypass loops and proper bypass valve

    Hi - and thanks in advance for reading - just joined... I have been looking into why my heating takes ages to warm up - had the system power flushed and lots of things checked... Today, I found this: This is one of 4 manifold pairs - and it also feeds the worst of the radiators for not...
  16. C

    Automatic bypass valve versus open radiator

    Hi I have an Evohome which maintains the set temperature and so when it powers the boiler most of the radiator valves are closed with one or two slightly open, basically just "topping up" rather than heating fully. This means that the automatic bypass valve (ABV) has to open as well. Now...
  17. D

    What does the internal bypass valve do in a Viessmann combi?

    Could someone please explain what is the function of the internal bypass valve in a Viessmann combi and how its settings MIN/MAX or malfunction somehow would affect operation of DHW and heating? Thanks in advance.
  18. S

    Bypass valve problem

    I have a S plan system with Ariston Clas HE boiler. Bypass valve is close to 1st radiator. When the hot water is on the radiators get hot. Motorised valves ok. Any ideas?
  19. B

    Altecnic Eres automatic bypass valve correct setting number

    Dear Sirs, I was wondering if someone could possibly inform me of the correct setting for my Altecnic Eres automatic bypass valve numbered from 0.1-0.5 bar.I have a conventional Ideal ff 350 Classic boiler .The central heating pump is a Grundfoss ups 3.15--50/65 set to speed setting...
  20. C

    Automatic bypass and radiator thermostatic valves

    Hi If the radiator valves are not demanding much heat and are near closed then the automatic bypass should be cutting in. I have a few queries that may be obvious but not to me as old system did not have an automatic bypass. [1] When it comes in it is shunting some of the hot water, will this...
Creating content since 2001. Untold Media.

OFFICIAL SPONSORS

OFFICIAL SPONSORS

Back
Top
AdBlock Detected

We get it, advertisements are annoying!

Sure, ad-blocking software does a great job at blocking ads, but it also blocks useful features of our website. For the best site experience please disable your AdBlocker.

I've Disabled AdBlock