The B. David Company produces premium quality Reverse Osmosis systems that meet virtually every need - from a single family home to a high volume commissary ice machine. These systems can be configured with a variety of options including, ultra-violet light and our own patented Split Filter which will prevent bio-film (bacteria) from forming in the holding tank. In addition, our prices for both replacement filters and complete systems are most competitive.
Solutions and technical advice - not quite sure how to proceed? No problem whatsoever! Just contact us explaining your specific water treatment needs. We will promptly give you a recommendation for the appropriate unit. In addition, we will supply you with all installation data and any ongoing technical information that may be needed.
Ongoing service 7 days a week - for as long as you are using our systems, you can contact us with any question that may arise.
The B. David Company produces two type of R/O systems:
1. Quick change filters
2. Traditional chambered filters
B. David Company 'Quick change' systems are our Premium Brand Reverse Osmosis Water Filter Systems
- User Friendly Quick-Twist Filter - simply twist the filters for effortless installation or replacement
- 3 and 4 Stage Filter Options
- Highest Quality and Performance Standards
- High Capacity Output
- Extensive range of filters and membranes
- Virtually Maintenance Free
- System automatically shuts off when tank is full
B. David systems offer high quality traditional under sink Reverse Osmosis Water Filter System at an Economical Price.
- 3 and 4 Stage Filter Options
- 3.2 gallon storage tank
- System automatically shuts off when tank is full
- Long reach non air gap faucet with optional air gap faucet
- Saddle valve assembly
- Drain clamp assembly
- Coded color tubing
- Instruction and installation manual
Need a quote for R/O Replacement filters? The B. David company will gladly give you a very competitive quote on any R/O filter that may be needed - no matter what system that you currently use.
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We can custom make any R/O system to meet your specific situation - - including the addition of an Ultra Violet Sanitizing light (220 or 100v), Pressure Pumps, Electronic Ballast, Flow Meters, moderate and high volume filters configuration
Home Water Filters - Reverse osmosis filter systems produce pure water by forcing untreated water or tap water through a semi permeable membrane (see how Reverse Osmosis works). Reverse osmosis can provide your home or business with healthier drinking water and protect you against low quality water that you may receive from a well or your public water pipes.
Producing Drinking Water Using Reverse Osmosis
Although Reverse Osmosis seems like a complex system it is really a simple and straightforward water filtration process. And it's not a new process. High-pressure (pump driven) reverse osmosis systems have been used for years to desalinate* water – to convert brackish or seawater to drinking water. Having a better understanding of how a reverse osmosis system works will eliminate the mystery and confusion you may feel when you look at a reverse osmosis system -- with its many colored tubes and multitude of filters. Read on to enhance your knowledge of residential reverse osmosis systems.
The most important points to remember:
- All RO Systems work the same way.
- Most RO (Reverse Osmosis) systems look alike.
- All RO Systems have the same basic components.
- The real difference is the quality of the filters and membranes inside the RO.
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How the Reverse Osmosis System Works?
Reverse Osmosis is a process in which dissolved inorganic solids (such as salts) are removed from a solution (such as water). This is accomplished by household water pressure pushing the tap water through a semi permeable membrane. The membrane (which is about as thick as cellophane) allows only the water to pass through, not the impurities or contaminates. These impurities and contaminates are flushed down the drain.
For a definition of **Reverse Osmosis.
Ultimately, the factors that affect the performance of a Reverse Osmosis System are:
1. Incoming water pressure
2. Water Temperature
3. Type and number of total dissolved solids (TDS) in the tap water
4. The quality of the filters and membranes used in the RO System (see operating specs)
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What does a Reverse Osmosis System Remove?
A reverse osmosis membrane will remove impurities and particles larger than .001 microns.
Basic components common to all reverse osmosis systems:
- Cold Water Line Valve: Valve that fits onto the cold water supply line. The valve has a tube that attaches to the inlet side of the RO pre filter. This is the water source for the RO system.
- Pre-Filter (s): Water from the cold water supply line enters the RO pre filter first. There may be more than one pre-filter used in a reverse osmosis system. The most commonly used pre-filters are sediment filters. These are used to remove sand silt, dirt and other sediment. Additionally, carbon filters may be used to remove chlorine, which can have a negative effect on TFC (thin film composite) & TFM (thin film material) membranes. Carbon pre filters are not used if the RO system contains a CTA (cellulose tri-acetate) membrane.
- Reverse Osmosis Membrane: The reverse osmosis membrane is the heart of the system. The most commonly used is a spiral wound of which there are two options: the CTA (cellulose tri-acetate), which is chlorine tolerant, and the TFC/TFM (thin film composite/material), which is not chlorine tolerant.
- Post filter (s): After the water leaves the RO storage tank, but before going to the RO faucet, the product water goes through the post filter (s). The post filter (s) is generally carbon (either in granular or carbon block form). Any remaining tastes and odors are removed from the product water by post filtration.
- Automatic Shut Off Valve (SOV): To conserve water, the RO system has an automatic shutoff valve. When the storage tank is full (this may vary based upon the incoming water pressure) this valve stops any further water from entering the membrane, thereby stopping water production. By shutting off the flow this valve also stops water from flowing to the drain. Once water is drawn from the RO drinking water faucet, the pressure in the tank drops and the shut off valves opens, allowing water to flow to the membrane and waste-water (water containing contaminants) to flow down the drain.
- Check Valve: A check valve is located in the outlet end of the RO membrane housing. The check valve prevents the backward flow or product water from the RO storage tank. A backward flow could rupture the RO membrane.
- Flow Restrictor: Water flow through the RO membrane is regulated by a flow control. There are many different styles of flow controls. This device maintains the flow rate required to obtain the highest quality drinking water (based on the gallon capacity of the membrane). It also helps maintain pressure on the inlet side of the membrane. Without the flow control very little drinking water would be produced because all the incoming tap water would take the path of least resistance and simply flow down the drain line. The flow control is located in the RO drain line tubing.
- Storage Tank: The standard RO storage tank holds up to 2.5 gallons of water. A bladder inside the tank keeps water pressurized in the tank when it is full.
- Faucet: The RO unit uses its own faucet, which is usually installed on the kitchen sink. In areas where required by plumbing codes an air-gap faucet is generally used.
- Drain line: This line runs from the outlet end of the reverse osmosis membrane housing to the drain. This line is used to dispose of the impurities and contaminants found in the incoming water source (tap water). The flow control is also installed in this line.
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