17,489 reputation
14396
bio website gregmaclellan.com
location Canada
age 33
visits member for 4 years, 4 months
seen 23 hours ago

Professional software developer, with several years working on industrial control and monitoring systems. Slowly remodeling parts of my house.


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revised Is there anything special needed to cut out a section of carpet?
added 1413 characters in body
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accepted How do I install a receptacle in the soffit?
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accepted How is pre-wiring done for motion sensors / alarm system in new construction?
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accepted Is there anything special needed to cut out a section of carpet?
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awarded  Nice Question
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comment Plumbing: Dual volume control valve WITHOUT mixing
I've certainly never heard of a valve that has two separate in/outs like you're describing. However, I am thinking about this being possible using solenoids.. but safety is an issue.
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comment Plumbing: Dual volume control valve WITHOUT mixing
Clearly this is related to your other question
Nov
20
comment Very old furnace- I need a technician to inspect it-What would be a good check up list?
I can't imagine anyone would be willing to provide that type of guarantee. If there does end up being a problem, how could you possibly prove whether the inspector missed it or if it was a problem that developed afterwards?
Nov
20
comment Why is my shower not draining, even though there is no physical blockage?
5' is 2m, so even if there is a vent, it's still too far away (assuming the drain pipe is 2" .. you didn't say). This unfortunately means whoever did your plumbing didn't know what they were doing, so this may just be the start of problems. What to do next depends on the bathroom layout, and if you can find and access a vent stack. Your local codes may also allow use of an AAV (air admittance valve, aka 'cheater vent'), but layout will also dictate if that's even possible. Post some pictures and/or drawings of the layout (with dimensions relevant to plumbing) and someone might be able to help.
Nov
20
revised How do I insulate my garage ceiling?
edited title
Nov
20
revised After moving stove and rewiring, why don't I get any heat from my stove?
Made title legible, fix grammar/punctuation
Nov
19
comment Inconsistent Garage Door Open Remotes
Definitely sounds like a radio interference issue. Has this always worked this way? Did you install the opener? How old is it? Make/Model #? Most openers have an antenna which is just a short piece of wire hanging down -- is it maybe inside or stuck up against some metal, or does re-positioning it help? Is the keypad wireless or wired? Have you tried changing/resetting the codes on the remotes?
Nov
19
revised Why is my shower not draining, even though there is no physical blockage?
edited title
Nov
19
revised How can I safely remove stick-on tiles that are on top of asbestos tiles?
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Nov
19
revised How can I repair this rotted section of wood siding?
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Nov
19
revised Why does my kitchen sink not drain properly after I don't use it for a while?
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Nov
19
comment Why does my kitchen sink not drain properly after I don't use it for a while?
A symptom of this would be that it would drain alright with a bit of water (such as if the tap was running), but not if a large quantity of water was put down the drain at once (such as when draining the whole sink). This may help @Lauren diagnose the issue. (Also in addition to clogged vent, consider: improperly installed vent, or vented using a 'cheater valve' which is now malfunctioning)
Nov
19
comment Why is my shower not draining, even though there is no physical blockage?
Sounds like a venting issue. Since you have it torn up, can you see where the vent is? Local code can vary, and the distance will depend on pipe size, but IIRC for 2" pipe the vent must connected be within 5' of the trap.
Nov
19
comment How can I determine what size pressure pump and tank do I need?
To answer your question, in order to size a pump you need to know the total dynamic head (TDH) and the flow rate you want. TDH is basically the vertical distance you're pumping, plus friction loss from the pipe. Friction loss depends on size of pipe plus flow rate. For example, if you want 13 US GPM through a 1" poly pipe, you're looking at TDH of about 91 ft (28 meters) -- there are charts for this. Looking at a couple pump sizing curves, looks like a 1/2 HP pump would work (but you need to check the curves for the pump you want to use, based on your TDH, flow rate and pipe size).
Nov
19
comment How can I determine what size pressure pump and tank do I need?
You don't need a pressure tank, you can literally just have a submersible or jet pump go into a pipe that is open at the other end. Probably not a bad idea to have a check valve if there's not one in the pump since otherwise the water in the pipe will drain back when turned off (not a big deal, just means it'll take longer when the pump does come on). The pump would be controlled by a float switch.