Water Filter

Dan Johnson · Nov 28, 2014

Further water filter clarification...

Both filters I mentioned are Whirlpool ones with three internal element choices. The filter cartridge in the dock-side filter I use is the carbon granular one as mentioned above. Because the club's water source is a well, it is utilized to remove sediment and taste (noticable when the water column in the well gets drawn down). It meets the NSF/ANSI Standard 42.

The filter cartridge in the boat's water system is of the next level, and is intended to additionally remove cysts.

Both filter cartridges have a nominal micron rating of 0.5. In an in-home use, they have a nominal useage life of 6 months.

The manufacturer states that they are not intended to be used with water that is "microbiologically unsafe or of unknown quality without adequate disinfection".

We drink and cook with bottled water. Boat water supply is used for cleaning.

Draw your own conclusions.

Ken13559 · Nov 29, 2014

Sailm8 said:
I have a PUR that is screwed on the sink tap. You twist it one way for filter and one for bypass.

Salim8, is your sink tap stock Hunter supplied?

Ken

thinwater · Nov 29, 2014

Dan Johnson said:
Both filters I mentioned are Whirlpool ones with three internal element choices. The filter cartridge in the dock-side filter I use is the carbon granular one as mentioned above. Because the club's water source is a well, it is utilized to remove sediment and taste (noticable when the water column in the well gets drawn down). It meets the NSF/ANSI Standard 42.

The filter cartridge in the boat's water system is of the next level, and is intended to additionally remove cysts.

Both filter cartridges have a nominal micron rating of 0.5. In an in-home use, they have a nominal useage life of 6 months.

The manufacturer states that they are not intended to be used with water that is "microbiologically unsafe or of unknown quality without adequate disinfection".

We drink and cook with bottled water. Boat water supply is used for cleaning.

Draw your own conclusions.

2 x 10 cartridges, I assume, or are they 4 x 10?. Which ones? Most 0.5 micron filters are too slow for tank filling, to most people's taste, only a few gpm, so I would like to know the product.

Given the filtration you have described, no reason not to drink it.

(The problem with NSF 42 certifications is that 42 comes in many levels, from materials only meaning no lead, to effective filtration. Unless you read the report, there is no telling what it does. NSF 53 is more specifically concerned with cyst removal.)

RichH · Nov 29, 2014

Dan Johnson said:
I have a whole house filter between the tank and pump on my H34. There is no problem pulling water through it for the two sinks and the shower.

- snip -

See pix attached.

DO NOT do this !!!!!!
Putting such a pleated filter on the suction side of a pump will most probably result in breaking and breaching the filter pleats.
Such pleated filters in this 'reverse' (flow from inside the pleat pack to outside the pleat pack) direction can only withstand 5-10 psi pressure drop before 'breaking' and tearing apart those pleats, much less if the 'pleat pack' does not have a molded structural polymer cage or perforated metal cage on the OD of the pleat assembly which 'helps' the pleats from 'blowing apart' due to pressure differential in the WRONG direction. This ('outside to inside of the pleat pack flow') is especially important with 'small' µM retention filters that develop LARGE pressure drops across the filter media.
In the correct flow direction, such cartridges can easily withstand 60 to 75 psi of differential pressure across that filter media.

Filters belong on the PRESSURE SIDE of pumps. Strainers are used on the SUCTION SIDE of pumps.
If you for some unknown reason MUST install a filter on the suction side of a pump ... install the filter so that the flow direction in the filter is from 'OUTSIDE the filter pleat pack to INSIDE the pleat pack'.

;-)

Jerry Clark H356 SV Persi · Nov 29, 2014

Safe H2O

Nick:
I installed this system in my boat before coming down to Punta Gorda last year. It has two filters and a UV light. We used the water straight from the tank the entire trip without worry. The annual cost of replacement filters and the uv light is $53. I came off just past the water pump, through the cabinet aft of the MarineAire, then to under the starboard settee. I had to route out some of the seat and mounted on an angle, but it fits under the seat-barely. This treats all the water from the tank as it is tank, pump, SafeH20, then manifold. From the filter, it goes to just before the manifold and then is distributed to everything, including hot water. All the boat water is going through this system. The safe H2O is rated at 3.0 GPM and we are less than that - 2.8 GPM for the stock Jabsco pump on the 356.

http://www.safh2ouv.com/Why-SAFH2O-UV-.html

They have the data on the site for what is filtered out and it gets most everything that could make you sick. The tank water stays chlorinated, so it is almost point of use.

It's a small company and they were excellant to deal with and the unit is $228. It took an afternoon to install with some flexible hoses and plastic fittings. We felt very safe with this system. They have a similar system that can be used in a survival situation to filter fresh water. This unit I have has the same pieces without the pump. Based on it being the same as The survival unit, I think you could fill your tank with lake water , filter and uv it, and drink it.

I used the 12 volt unit, I think it is the 512 unit, and tied the uv light to the water pump circuit. I have winterized and don't have any pictures, but if you decide on this one, let me know. I will be on the boat in a few weeks to charge batteries and can take some pictures.

Terry Cox · Nov 29, 2014

PUR Water Filter

Ken13559 said:
Salim8, is your sink tap stock Hunter supplied?

Ken

Hi Ken, sorry to hijack Salim8's reply. The PUR water filter that we use will fit most any type of standard galley sink faucet spout. Our galley faucet is an original 1991 Grohe model. PUR normally includes an assortment of adapters, one of which should fit your spout. I normally filter only the water we ingest by keeping four 16oz water bottles in the fridge ready to use.

Like Salim8, we use water straight from the tank for everything else. Our tank water is safe to drink, clean and odor free. I use the PUR for extra protection. A PUR filter usually lasts us a season.

FWIW, I purchased our PUR filter from a local thrift store for $3. The filter elements came from Costco and PUR sent me a package of adapters free of charge, since the one from the thrift store had none.

Ken13559 · Nov 30, 2014

Terry Cox said:
Hi Ken, sorry to hijack Salim8's reply. The PUR water filter that we use will fit most any type of standard galley sink faucet spout. Our galley faucet is an original 1991 Grohe model. PUR normally includes an assortment of adapters, one of which should fit your spout. I normally filter only the water we ingest by keeping four 16oz water bottles in the fridge ready to use.

Like Salim8, we use water straight from the tank for everything else. Our tank water is safe to drink, clean and odor free. I use the PUR for extra protection. A PUR filter usually lasts us a season.

FWIW, I purchased our PUR filter from a local thrift store for $3. The filter elements came from Costco and PUR sent me a package of adapters free of charge, since the one from the thrift store had none.

Terry, thanks for reply. I like the idea of using PUR on the tap. Simple enough to fit and with choice of filtered or not. Thanks again.

Benny17441 · Nov 30, 2014

I have found that add-on filters can remove dirt, some odors from the water and improve its taste but basically do very little to improve the water quality. If you currently have no problems with suspended solids, odors or taste there might not be a need for a water filter. Chemical treatment and hygienic storage are the main ways of maintaining good drinking water. If you are going to use the water for coffee and cooking but processes will purify the water as it heats it. When used promptly I have found no problems with the quality of tank water but if left to sit for long periods of time I would not drink it with or without filters.

thinwater · Nov 30, 2014

seadaddler said:
I do add a product called Tastepure and keeps waters stored water fresh tasting & odor free and use and do same in my RV.
Nick

Taste Pure is just bleach, diluted and labeled for your convenience. The only product I've come across using a different chemistry is Aqua Mega, which uses a stabilized form (used in pools); much more stable residual and much less corrosive to aluminum.

I think most people don't think about the water much at all. They either clean the tanks once in a while, try to keep it fresh by using iti and drink it without worry, or they carry bottles. The number that practice chlorination and/or with good filtration systems is very low percentage, think.

What is scary is the number of posts with no idea of what they actually fear, what the chemistry of concern is, and what the different chemicals or filters actually do. It should be obvious that the VAST majority of filtration, therefore, is "feel good."

Taste is the most common complaint. The cause is generally chlorine, sulfide from sulfate, or humic acids. All are harmless and the best cures vary. Those things that are harmful (cysts, bacteria, metals) will not be noticeable.

Oh well. Thank goodness US water is very safe.

My suggestion is that you research water treatment on-line. I know we don't all like chemistry, but what could be more important than what you drink? EPA and WHO sites are a very good starting point. Read the third world stuff first, as it tends to be more practical and less CYA, out of basic need.
http://sail-delmarva.blogspot.com/2014/06/drinking-water-filtration-short-version.html

Dan Johnson · Dec 1, 2014

Hornet's nest...

Looks like I kicked this one!

Appreciate Rich H's comment but these are whole-house filters intended for insertion in home water lines where the pressure is from 40 to 60 lbs PSI. They are rigged as per the manufacturer's instructions, with water going in the "in" port and out the "out' port.

They are Whirlpool manufacturerd to answer another question.

The dock's water pressure is rarely over 15 to 20 lbs PSI, so the dockside filter isn't being stressed. Aboard the boat I have a Jabsco ProMax-4 that flows about 4 GPM at a reasonable pressure. I doubt it it would do damage to the filter between the tank and pump, which doesn't appear to have had any internal breakdown each time I've examined it after changing it out each season.

'Nuff said.