Can we extend our water system beyond Basekamp?
Updated 4moUpdated 4 months ago
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1
Our current setup (system 1.0)
At the moment, our well water is pumped up with a submersible pump (Pedrollo UPm 2/4-GE). It pumps water up the 8m deep well, through 40mm HDPE pipes and 1¼” brass fittings, including a check valve mounted just above the well lid.
A long 40mm HDPE pipe moves the water to our kitchen container in Basekamp, where all our installations and outlets are. Our pressure tank (200L), sediment filters and uv filters are all in the same place, mounted to the back of the kitchen container.
This setup has offered us drinkable water, of which the quality is successfully tested each summer. An earlier research module shows how this has been achieved: https://community.projectkamp.com/research/can-we-drink-the-water-from-the-land
A total of 400 m3 of water (drinking + non-drinking) has been used in season 3.
So the setup works well for our current needs, but now that we want to bring water to other areas, it might not be ideal to have all the installations in this location.
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Our needs for system 2.0
Created 1yCreated over 1 year ago
The middle land, granite ruin and sketchy ruin are quite far away from the kitchen container and none of them currently have their own water supply.
The middle land is used as a living area for the people living in Kamp for the long-term. The granite ruin is intended as a multi-purpose building that will also function as a water access point for the middle land. Here, we want to place an outside tap with drinkable water.
The sketchy ruin was also built as a multi-purpose building. It is currently used as an office and in the future might be transformed into a guest house. We will most likely install a shower here in the future and no drinking water.
For a big water system upgrade in the future (when the community centre is built), we might look for a second water source. For this system upgrade however, we want to use the same well and pump that are currently in use.
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3
First plan for system 2.0
Created 1yCreated over 1 year ago
We have come up with a plan for system 2.0 and we are curious to hear your opinion!
We want to move our pressure tank and sediment filters to a centralised location, next to the well. We think uv filters are probably good to have close to the outputs so we can place those where we need them: kitchen + granite ruin.
Our current scenario for peak water use adds up to 74 L/min (shower 18 + kitchen tap 8 + outdoor tap 35 + garden hose 13). If we add an outdoor sink and shower, this adds up to 127 L/min.
Will our plan for system 2.0 have enough pressure & flow everywhere with the added tube lengths and height differences? Which of the current components would we need to upgrade? Is there anything else for us to keep in mind? Let us know in the comments!
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4
System 2.0 design
Our design for system 2.0 is finished. Based on the previously mentioned plan and variables, we have drawn a number of 2D images with part lists that we would like to use for the construction of our upgraded water system. The design can be found in the attached PDF.
Right now, we are not completely sure if this design would work and we would love to have our design validated by an experienced plumber. Is there any expert in our community that can check the design for us?
Specific uncertainties we have are:
Should we expect pressure issues anywhere on the land (too high or low)?
Does anything need to be increased in size (pressure tank, sediment filters, 1" fittings)?
Is our current design of pressure gauges and relief valves in every location sufficient?
What is the best way to build the box that will go around the installations to protect them?
Is there anything else for us to keep in mind? Please let us know in the comments!
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5
System 2.1 Design and update
Last year we worked on a design for an upgraded water system, this year we want to build the new design.
We will implement several of the changes as suggested in the 2.0 design, the main one being the centralized system.
UV filters:
UV filters will be placed at both kitchen and granite ruin, partially because the existing filters have a capacity that is too low to take care of the full need of Kamp at peak consumption. partially because in situations with low consumption (at granite ruin or office) we may see a long dwell time of water in the pipes, this could cause bacterial growth after the UV filter, this may defeat their purpose.
Peak consumption / expected consumption
we have decided to accept pressure drops at theoretical peak consumption moments (measured to be at a theoretical 127 l/min.
in the existing situation pressure drops during use are not experienced as a problem, a slightly lower pressure at the water taps is an acceptable downside, especially considering that reaching the peak consumption with minimal pressure drop would require sourcing a larger pump, flow meter and (UV) filters, all of these would add to the power consumption with minimal gains in user experience.
Sediment filters:
we have decided to upgrade the sediment filters, the existing filters have a few issues:
-undersized, they seem to cause a high pressure drop, especially when dirty.
-lifetime of 4 to 6 weeks for existing filters, leads to high plastic waste.
-first stage is too fine for the largest particles, we want to add a coarser stage to increase lifespan of finer stages.
we are currently searching for a European manufacturer of filters that are either washable or have a larger replacement interval, any suggestions on filter options are welcome.
new water hub:
we will build a new water hub next to the well, this should give us more space for future changes and should allow us to make an installation that is more future proof.
UV protection:
we will try to cover the PE pipes to protect them from UV, any suggestions for a good protection system is welcome, one option would be to use mimosa trunks.
what we will not implement:
RO filtration: the existing filtration leads to safe drinking water, added investments for the smallest particles seem unnessecary at this point.
Water tower / buffer: at this point building a water tower / buffer system seems less beneficial, our well seems to provide sufficient water year round, the slight pressure drop we currently experience a peak loads does not cause enough issues to warrant implementation of a water tower. the energy that we could theoretically store with a water tower is interresting but at this point we dont expect to gain enough from a water tower to make it a reasonable investment.
-pressure reducing valves: pipe pressure class is easily within range of our max water pressure.
We have made a new P&ID of the system and a CAD design of the new water HUB.
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