Pentek Sediment Filters

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Sediment cartridge filters are primarily used to remove silt, sand or other particulate matter from water. These standard size water filters are 2-5/8" in diameter either 9-3/4" in length (for 10" housings) or 20" long (for 20" housings). These filters do not contain any activated carbon and so do not improve the taste/odor of water or remove chlorine. For carbon or carbon impregnated standard size cartridge filters, click here.

S1 Series cartridge filters are inexpensive pleated cellulose filters recommended for chlorinated water supplies
P Series cartridge filters are manufactured from pure spun polypropylene and are available in 1, 5 and 25 nominal micron ratings
PD Series filters also known as Polydepth™ filters are similar to the P series above except that they have a solid polypropylene core for added strength and resistance to pressure. These are melt spun polypropylene depth filters.
CW Series and WP Series string wound polypropylene cartridge filters are available in a wide range of micron ratings, are temperature resistant up to 165°F and are economically priced
CP and ECP Series cartridge filters are composed of a special formulation of resin-impregnated cellulose and polyester fibers that provides higher wet strength than regular cellulose cartridges with minimal unloading and media migration. ECP filters replace the now obsolete HFCP filters.
R Series pleated polyester cartridge filters are durable and reusable

Filter Selection Guide

See individual products for additional information.

Code	Name	Image	Price
W2T156381	S1 Pleated Filter, Pentek 155001-43, 20 Micron, 9-3/4 Inch x 2-5/8 Inch (L x W)		$3.99
W2T167175	S1-20 Pleated Filter, Pentek 155303-03, 20 Micron, 20 Inch x 2-5/8 Inch (L x W)		$8.49
W2T165701	P5-478 Spun Polypropylene Filter, Pentek 155030-43, 5 Micron, 4-7/8 Inch x 2-3/8 Inch (L x W)		$3.99
W2T167807	P-1 Spun PP Filter, Pentek 155225-43,1 Micron, 9-3/4 Inch x 2-3/8 Inch (L x W)		$3.99
W2T158033	P-5 Spun PP Filter, Pentek 155014-43, 5 Micron, 9-3/4 Inch x 2-3/8 Inch (L x W)		$3.79
W2T357548	P-25 Polypropylene Filter, Pentek 155015-43, 25 Micron, 9-3/4 Inch x 2-3/8 Inch (L x W)		$3.69
W2T357639	P1-20 Spun PP Filter, Pentek 155304-43, 1 Micron, 20 Inch x 2-3/8 Inch (L x W)		$6.49
W2T357549	P5-20 Spun PP Filter, Pentek 155016-43, 5 Micron, 20 Inch x 2-3/8 Inch (L x W)		$6.29
W2T357612	P25-20 Polypropylene Filter, Pentek 155226-43, 20 Micron, 20 Inch x 2-3/8 Inch (L x W)		$4.89
W2T357614	P1-30 Spun PP Filter, Pentek 155227-43, 1 Micron, 30 Inch x 2-3/8 Inch (L x W)		$12.99
W2T166733	P5-30 Spun PP Filter, Pentek 155228-43, 5 Micron, 30 Inch x 2-3/8 Inch (L x W)		$11.99
W2T436706	CW-F Cord Wound PP Filter, Pentek 155186-43, 5 Micron, 9-7/8 Inch x 2-1/4 Inch (L x W)		$3.99
W2T147109	CW-MF Wound Cord PP Filter, Pentek 155187-43, 30 Micron, 9-7/8 Inch x 2-1/4 Inch (L x W)		$3.49
W2T176859	CW-50 String Wound PP Filter, Pentek 155214-43, 50 Micron, 9-7/8 Inch x 2-1/4 Inch (L x W)		$3.49
W2T161927	WP-5 String Wound PP Filter, Pentek 155071-43, 5 Micron, 9-7/8 Inch x 2-1/4 Inch (L x W)		$4.69
W2T156785	WP-30 String Wound PP Filter, Pentek 155072-43, 30 Micron, 9-7/8 Inch x 2-1/4 Inch (L x W)		$4.69
W2T165071	R30-478 Pleated Polyester Filter, Pentek 155031-43, 30 Micron, 4-7/8 Inch x 2-5/8 Inch (L x W)		$6.49
W2T158035	R30 Pleated Polyester Filter, Pentek 155017-43, 30 Micron, 9-3/4 Inch x 2-5/8 Inch (L x W)		$6.99
W2T156382	R-50 Pleated Polyester Filter, Pentek 155038-43, 50 Micron, 9-3/4 Inch x 2-5/8 Inch (L x W)		$6.99
W2T147664	R30-20 Pleated Polyester Filter, Pentek 155416-43, 30 Micron, 20 Inch x 2-5/8 Inch (L x W)		$11.99
W2T201130	ECP-1 Pleated Polyester Filter, Pentek 155181-43, 1 Micron, 9-3/4 Inch x 2-5/8 Inch (L x W)		$5.99
W2T373817	ECP5-10 Pleated Polyester Filter, Pentek 255482-43, 5 Micron, 9-3/4 Inch x 2-5/8 Inch (L x W)		$4.99
W2T373818	ECP20-10 Pleated Polyester Filter, Pentek 255483-43, 20 Micron, 9-3/4 Inch x 2-5/8 Inch (L x W)		$4.89
W2T463280	ECP50-10 Pleated Polyester Filter, Pentek 255484-43, 50 Micron, 9-3/4 Inch x 2-5/8 Inch (L x W)		$4.89
W2T373819	ECP1-20 Pleated Polyester Filter, Pentek 255485-43, 1 Micron, 20 Inch x 2-5/8 Inch (L x W)		$11.99
W2T373820	ECP5-20 Pleated Polyester Filter, Pentek 255486-43, 5 Micron, 20 Inch x 2-5/8 Inch (L x W)		$8.99
W2T373821	ECP20-20 Pleated Polyester Filter, Pentek 255487-43, 20 Micron, 20 Inch x 2-5/8 Inch (L x W)		$8.99
W2T373822	ECP50-20 Pleated Polyester Filter, Pentek 255488-43, 50 Micron, 20 Inch x 2-5/8 Inch (L x W)		$8.99
W2T142688	Polydepth Filter, PD-1-9.75, Pentek 155748-43, 1 Micron, 9-7/8 Inch x 2-1/2 Inch (L x W)		$4.59
W2T152889	Polydepth Filter PD-5-9-3/4, Pentek 155749-43, 5 Micron, 9-3/4 Inch x 2-1/2 Inch (L x W)		$4.59
W2T152207	Polydepth Filter PD-10-9-3/4, Pentek 155750-43, 10 Micron, 9-3/4 Inch x 2-1/2 Inch (L x W)		$4.59
W2T373777	Polydepth Filter PD-25-9-3/4, Pentek 155751-43, 25 Micron, 9-3/4 Inch x 2-1/2 Inch (L x W)		$4.59
W2T357713	Polydepth Filter PD-50-9-3/4, Pentek 155752-43, 50 Micron, 9-3/4 Inch x 2-1/2 Inch (L x W)		$4.59
W2T357714	Polydepth Filter PD-1-20, Pentek 155755-43 , 1 Micron, 20 Inch x 2-1/2 Inch (L x W)		$6.79
W2T146865	Polydepth Filter, PD-5-20, Pentek 155756-43, 5 Micron, 20 Inch x 2-1/2 Inch (L x W)		$6.69
W2T463240	Polydepth Filter PD-10-20, Pentek 155757-43, 10 Micron, 20 Inch x 2-1/2 Inch (L x W)		$6.59
W2T478985	Polydepth Filter PD-25-20, Pentek 155758-43, 25 Micron, 20 Inch x 2-1/2 Inch (L x W)		$6.59
W2T368494	Polydepth Filter PD-50-20, Pentek 155759-43, 50 Micron, 20 Inch x 2-1/2 Inch (L x W)		$6.59
W2T357721	Polydepth Filter PD-1-30, Pentek 155762-43, 1 Micron, 30 Inch x 2-1/2 Inch (L x W)		$11.99
W2T456826	Polydepth Filter PD-5-30, Pentek 155763-43, 5 Micron, 30 Inch x 2-1/2 Inch (L x W)		$11.89
W2T357724	Polydepth Filter, PD-25-30, Pentek 155765-43, 25 Micron, 30 Inch x 2-1/2 Inch (L x W)		$11.79
W2T519418	Polydepth Filter PD-1-40, Pentek 155769-43, 1 Micron, 40 Inch x 2-1/2 Inch (L x W)		$13.99
W2T357727	Polydepth Filter PD-5-40, Pentek 155770-43, 5 Micron, 40 Inch x 2-1/2 Inch (L x W)		$13.99
W2T373780	Polydepth Filter PD-25-40, Pentek 155772-43, 25 Micron, 40 Inch x 2-1/2 Inch (L x W)		$13.89

Which sediment filter cartridge should I choose?

Size of Filter

If you are replacing an existing filter cartridge, you should first verify the diamter and length of your existing filter cartridge. Standard diameter filters vary from a width (diameter) of 2-1/2 to 2-5/8 inches and are available in 10, 20, 30 and 40 inch lengths. "Big Blue®" diameter filters are approximately 4-1/2" in diameter and available in lengths of 10 (9-3/4") and 20 inches. Big Blue® diameter filters are normally chosen for their high capacity (longer interval between filter changes) rather than higher flow rates. If you are choosing a filter for a new system to be installed, you should choose a filter size based on desired flow rate. A general rule of thumb for nominal rated sediment filters is about 8 gallons of minute maximum flow per 10" of filter for filters 5 micron and larger and 5 gallons per minute of flow per 10" of filter for filters less than 5 micron in rating. Undersizing a filter may lead to higher pressure drops across the filter and faster than desired filter change intervals. Oversizing a filter simply results in more cost and a larger filter space footprint.

Type of Filter

PENTEK® sediment filters can be broken down into two basic categories - pleated filters and depth filters. Pleated filters feature high flow rates and low pressure drops. Pleated cartridge filters are ideal for home point of entry for residential commercial usage because of their high flow rates and low pressure drops. Because pleated filters are a "surface filter" they capture particles on the surface of the media - giving the filter a sharp cutoff on the size of particles captured (for example a 5 micron pleated filters will not capture most particles under 5 micron but will capture the majority of particles 5 microns and above). Because particles 20 microns and smaller in diameter are not visible with the naked eye, 20 micron pleated sediment filters are common for residential usage.

PENTEK® depth sediment filters are named so because they capture particles through the entire depth of the filter media which tends to be a thick layer of media. Because depth filters capture a broader size of particles both below and above the micron rating of the filter, they are popular for pretreatment applications where the filter is protecting other equipment downstream of the filter (such as a reverse osmosis system).

Filter Material of Construction

Sediment filters are constructed of cellulose polyester, polyester (100%), polypropylene or cotton. Applications with non-chlorinated water are recommended to stay away from cotton or cellulose polyester as this media can provide a food source for bacteria. Municipal or other chlorinated water sources can pretty much use filters with any media type since the chlorine reduces bacterial growth. Polyester is normally used in pleated filters and polypropylene in string wound or melt spun filters simply for ease of construction. Both materials have similar properties. If the application is odor/taste improvement or chlorine reduction in addition to particle filtration, you may want to consider a carbon impregnated pleated filter or even better a carbon block filter with both attributes.

Choosing a Filter Micron Rating

A general rule of thumb is to choose a filter with the largest micron rating to accomplish your goal. Particles smaller than 20 micron are not visible to the naked eye so if your goal is to reduce visibly objectionable particles a 20 micron or 10 micron filter is probably sufficient. Pretreatment for a reverse osmosis system or carbon block filter is generally recommended at 5 microns to prevent damage to the RO membrane or premature clogging of the carbon block filter. Cysts are about 1 micron in diamter and bacteria can be as small as .2 microns. It is possible to filter out cysts and bacteria but a nominal filter cartridge is not recommended for this application. You should see Siemens FCNA, FCPP or FCWN series of filters for absolute rated filtration.

Siemens recommends:

Application	Recommended Series	Why We Recommend
Coarse Sediment Removal	R Series >= 30 Microns, ECP Series <= 25 Microns	High Capacity, Low Pressure Drop
Fine Sediment Removal	P or PD Series	Depth Filters Capture Wider Range of Particles Including Smaller Ones