Defosses Plumbing and Heating offers a myriad of Water Filtration Services.
Water purification is the process of removing undesirable chemicals, materials, and biological contaminants from contaminated water. The goal is to produce water fit for a specific purpose. Most water is purified for human consumption (drinking water) but water purification may also be designed for a variety of other purposes, including meeting the requirements of medical, pharmacology, chemical and industrial applications. The purification process of water may reduce the concentration of particulate matter including suspended particles, parasites, bacteria, algae, viruses, fungi; and a range of dissolved and particulate material derived from the surfaces that water may have made contact with after falling as rain.
Frequently ask questions: Why does my water smell like rotten eggs? Why are there brown stains on my sink, tub, and toilet? Why does my shower always looks like it has soap scum on it?
Well the answers to these questions is: the odor generally is hydrogene sulfide gas, the brown staining in most cases is iron deposits and the soap scum is caused by hard water with levels of either calcium, maginese or both
The filtration system picture below will remove all of these items and give you clean water.
The standards for drinking water quality are typically set by governments or by international standards. These standards will typically set minimum and maximum concentrations of contaminants for the use that is to be made of the water. It is not possible to tell whether water is of an appropriate quality by visual examination. Simple procedures such as boiling or the use of a household activated carbon filter are not sufficient for treating all the possible contaminants that may be present in water from an unknown source. Even natural spring water – considered safe for all practical purposes in the 19th century – must now be tested before determining what kind of treatment, if any, is needed.
Reverse osmosis (RO) is a membrane technical filtration method that removes many types of large molecules and ions from solutions by applying pressure to the solution when it is on one side of a selective membrane. The result is that the solute is retained on the pressurized side of the membrane and the pure solvent is allowed to pass to the other side. To be “selective,” this membrane should not allow large molecules or ions through the pores (holes), but should allow smaller components of the solution (such as the solvent) to pass freely.
In the normal osmosis process the solvent naturally moves from an area of low solute concentration, through a membrane, to an area of high solute concentration. The movement of a pure solvent to equalize solute concentrations on each side of a membrane generates osmotic pressure. Applying an external pressure to reverse the natural flow of pure solvent, thus, is reverse osmosis. The process is similar to other membrane technology applications. However, there are key differences between reverse osmosis and filtration. The predominant removal mechanism in membrane filtration is straining, or size exclusion, so the process can theoretically achieve perfect exclusion of particles regardless of operational parameters such as influent pressure and concentration. Reverse osmosis, however, involves a diffusive mechanism so that separation efficiency is dependent on solute concentration, pressure, and water flux rate. Reverse osmosis is most commonly known for its use in drinking water purification from seawater, removing the salt and other substances from the water molecules.
Home water filter types
Point of use water filters include:
Faucet Filters are designed to screw onto a faucet. They generally use an activated carbon or microporous filter that traps impurities as water flows from the faucet. Shower water filters are specially designed faucet water filters meant for use on a shower head.
Inexpensive, portable, easy to install, can be used in rental homes
Slow water flow, only filter water at one faucet, replacing filter may get expensive over time
Countertop water filters sit on your countertop by the sink, and are connected by a hose to your water faucet. Most have a storage tank, and use both an activated carbon filter and a reverse osmosis filter to remove up to 99.9% of the contaminants in your tap water. Some countertop units even include a UV light source to disinfect water.
Easy to install, inexpensive, can be used in rental homes, removes up to 99.9% of contaminants
Slow, limited capacity
Inline/Undersink water filters are installed ‘in line’ with your plumbing. They may require professional installation by a plumber. Most use a combination of methods including activated carbon filtering, reverse osmosis and ionization to filter water for impurities and soften it.
Larger storage tank the countertop filters, easy to maintain, is installed out of sight
More expensive, may require professional installation, may not be acceptable in rental housing
The other option for water filtration – and the best one if your water comes from a well – is a whole house water filter. These are usually installed at the point of entry for your water, and use a combination of filtering systems to remove all possible contaminants from your water.
Considerations for Choosing a Water Filter
• Output capacity
• Type of filtration used vs. type of contaminant in water
• Use of water