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Hello Wayne! Thanks fo the clear direction. Can I tie over to the vertical 2" dry vent of the lav in the same wall to connect washer drain to that vent with 1.5" horizontal off the washer drain pipe or do I need a seperate dry vent riser there?

Hello All! Two toilets on a 3" line to drain drop into sewer (marked "S" in drawing) , each with a wet vent 1. Each wet vent is 2" and serves as drain for one lav and one sho 2. Washers have dry vent connection and seperate drain 3. The second toilet has a wye to connect to wet vent. Is...

Hello jadnashua, Thanks for the ideas here. I had not considered these approaches. Also, I have access to about 50-60% of the lines and could insulate them...that will help. Shawn

Hello breplm, This looks like a sweet system! There may be some adjusting to install the pump near the boiler. The first issue I see is that the hot water sensor is factory installed at the pump. That works with under sink install. I would need a way to move the sensor to the tee under the...

Hello All, I am looking for the right recirculation system for my home. 1. I will provide 1/2" return lines to kitchen and two remote bathroom groups, each with a tee to the hot water supply for each location (all currently homerunned) and with a check valve at each end point. 2. I plan to tee...

Thanks Jim! Very helpful.

I have installed a new MOD CON boiler and I've set the system temp to 115 degrees, which gives me a EWT of 109degrees. At this setting it condenses abundantly and uses fuel efficiently. But, it needs to run constantly. The system is only partly running. The one zone that is connected is a...

Hello All, Most recent version of wall hung mod con boiler schematic. I'm halfway through the hydronic piping now. Please comment on attached image. Shawn

Hello all, My wall mount Lochinvar has an optional input for a flow switch. Is it an important component to install, or would the boiler already have a safety and shut down when the fire tube heat exchanger is overheated? If a switch is needed, then which products are best? Most seem to be...

Hello fitter30, Those controls are a better deal than the Lochinvar controller. I thought the Lochinvar would play better with the boiler of the same brand. But, I think it is not needed. The piping diagram I am considering is the same one uploaded to the original post (boiler scheme 6)...

Hello John, I have ended up with more zones than I wanted, due to a couple reasons. I have mixed radiation types that require different temperatures. And, I am safeguarding for the house to be split into two apartments in 10 years or so. If that does happen, the bedrooms in one wing need...

Hello fitter30, My plan is to have 3 temperatures plus DHW. I am using cast iron baseboard as a high temperature heat (although I would still like to have return water below 130). I am also using an in-floor radiant heat. In this case the tubing is under cement board and tile. Lastly, I am...

Hello All, The system I am installing has three temperature space heating requirements plus DHW priority zone. Of these temperature requirements, there are multiple zones in each. My plan is to use manifolds with 4-wire actuators tied to thermostats. Additionally, the thermostat signal needs...

Thank you John! I am definitely learning here. So the comments are useful. It seems to me that standard approaches are always changing. I put in a cast iron boiler years ago, and the circulator on the return or supply side seemed to be an issue of debate. Anyway, I will update some photos...

Hello John, Thank you for the reply. I've posted in my reply to fitter30 two files. One of a revised scheme and one of the drawing I referenced. I have identified in the new schematic the closely spaced tees for the DHW and for the initial loop to and from the boiler. Should I have more...

Hello fitter30. Thank you for the reply. I've modified the schematic based on your comment. I also included the drawing I referenced. I've simplified the layout with one circulator for high heat and one for the radiant heat, which will have a controlled, low temperature for that manifold...

Hello All, I plan to use mixing valves as opposed to injection to mix temperatures for radiant heat. The boiler I have chosen has a number of sensors and features which regulate water temperature in order to maximize condensation. Above this requirement, my system also needs to control water...

Hello All, I plan to use mixing valves as opposed to injection to mix temperatures for radiant heat. There is a lot of opinion out there about which is better, but one comment stuck with me that injection is more important for boiler protection for cast iron boilers and mixing valves are a...

Hello fitter30, It looks like there is more information in the drawing you sent than I could glean from it...at 72 DPI, I enhanced the resolution but still struggled to read any of the writing. I revised my drawing the best I could tell to match. I did not understand your question "what is...

These have been helpful replies and I suppose confirmed what I knew. It just seemed that the heat pumps could mostly do the job already, so it was getting stupid to put so much into a MOD CON system, especially since I still have all that cast iron BB to install. But, the comments are really...