Hi, this is Jeff. Today, I'd like to talk to you about backflow prevention, but before we begin, please note that it's important for you to check with your local municipality to find out their requirements regarding backflow prevention in your area. Backflow is the unintended reversal of the normal flow of water in a plumbing system. It's caused by one of two conditions: back siphonage and back pressure. Back siphonage occurs when the normal pressure in the system turns negative, causing a reversal of the normal flow of water in the system. Back pressure, on the other hand, is when the pressure on the outlet side of the fixture is greater, causing the water to reverse itself in the water system.
Fisher offers four general types of backflow prevention. We use an air gap, we use an atmospheric vacuum breaker, a dual check valve backflow preventer, and an anti-spill pressure style vacuum breaker. Each has its own unique application. Air gap is the distance between where the water comes out of the fixture and the flood rim of the sink. You need to maintain a minimum of 2" air gap. The dual inline check valve backflow preventer is used whenever you have a flexible air gap, such as on a pre-rinse where the outlet of the device could well be below the flood rim of the sink. Atmospheric vacuum breakers commonly found on kettle fillers and service faucets are designed to prevent back siphonage. The caution is that you are not allowed to have any shut-off valves downstream of the atmospheric vacuum breaker. Anti-spill pressure style vacuum breakers are commonly found on hose reel units. They protect against back siphonage, back pressure, and it's important to note that you can have valving on the inlet side of this and the outlet side of it. And they are not to be installed above ceiling tiles in the wall, it must be accessible for inspection. Backflow prevention can be quite complex, however, in the Fisher catalog we offer many kits and components to make the process quite simple. Be sure and check your local codes. Thanks for watching.
With four general types of backflow prevention, you're sure to find the best one to suit your needs with Fisher. Watch this video to learn all about the various fixtures you can use to help prevent backflow in your plumbing system!
Hi this is Jeff, today i'd like to talk to you about faucet stems. The stem in anybody's faucet is the mechanism that actually shuts the water on and off and such out of a faucet. So what we at Fisher do is we have check stems, 2 part swivel stems. The 2 part swivel stem is used in faucets where there is just two valves. Picture the hot water side and the cold water side of a faucet and that application we would use the 2 part swivel stem. Okay, check stems consist of three basic parts: the disc retainer and seat washer, a stainless steel spring, and the stem body. The spring lives inside the body and the disc retainer fits inside and that' has become the spring-loaded check stem. Spring loaded check stems are designed to prevent cross flow. So let's take a look at this faucet cross section and look at what cross flow is. Cross flow is when you have a differential in water pressure between the hot and the col. For example you might have 60 pounds of water pressure on the hot and maybe 40 pounds of water pressure on the cold. That'd be 20 PSI differential between the two. IF both these valves were completely open, you can see where the hot water at 60 PSI, 20 pound difference is going to flow right into the cold side, and now you're putting hot water into the cold side which means you're putting hot water into an ice machine or flushing toilets with hot water, not a good thing. So what we do is we put in spring loaded check valves to prevent that. So, whenever we have a faucet fixture with one, two, and three maybe a spray valve out of here, three valves, as soon as that third valve is closed, all this water becomes static and these springs come down and shut off the water supply to the faucet, preventing cross flow. Okay, so now let's take a look at the Fisher swivel stem. We use a two part swivel stem, and what we mean by that is the black seat washer is attached to a swivel on the end of the stem. So as the stem screws down into the faucet body and it makes contact with our stainless steel seat, as soon as it makes contact it becomes more of a plunging action. This is why the Fisher 2 part swivel stem means lower maintenance. One of the most important things in anybody's faucet is going to be the seat. The seat is actually the part where the rubber seat washer seats onto the seat to shut the water off. Everybody else uses brass seats. Brass is a very soft material, and as water flows across that seat, it erodes the seat, and then no matter how many times you replace the seat washer, it still leaks. Fisher uses stainless steel seats in all of its products. Stainless steel seats guaranteed for life. Well it seems that Fisher's stem story is complete. A 2 part swivel stem means lower maintenance and stainless steel seats that are guaranteed for life. That's Fisher, thanks for watching.
Learn all about the ins and outs of Fisher's check stems and 2 part swivel stems by watching this video. With great features, including stainless steel seats with a lifetime guarantee, it's no wonder you'll choose Fisher for all your faucet needs!
Hi, this is Jeff. Today I'd like to talk to you about the difference between our 1/2" faucet line and our 3/4". On a 1/2" faucet, we learned on an earlier video that a 1/2" faucet is always defined by its inlets. The inlet of a 1/2" faucet is 1/2" on the inside. Using our close elbow... we always use those so we can fit this 90 degree turn within the 2" backsplash of the stainless steel sink. On a 3/4" faucet, the inlets are 3/4" inside diameter, and with a 3/4" faucet, the elbows are always included with the faucet for easy mounting onto a backsplash. So the elbows go on like that. Now, just to illustrate the difference again between the 3/4" and 1/2", 3/4" and 1/2" - big, big difference. One of the other differences between our 1/2" faucets and our 3/4" faucets is that we put an aerator on all of our 1/2" faucets. This aerator is a 2.2 gallon per minute (gpm) aerator, which happens to meet the standard code throughout the country. Now, if you happen to be chasing any LEEDS points, we make aerators from 5 gallon per minute all the way down to 0.5 gallon per minute. So, depending upon your application, we can supply the correct flow rate on any of our swing spouts for you. A 3/4" faucet, you'll notice, does not have an aerator on it, because it's a fill faucet, and we don't put an aerator on it, because we don't want any restriction at all. We want lots of water coming out of it. The faucet itself, just like our 1/2" line, has got stainless steel seats that are guaranteed for life, and a two-part swivel stem for low maintenance. The big difference of the stem assembly, of course, is that we use a full 3/4" opening through this seat to allow large flow out of the spout. With both these valves open all the way at about 60 pound of square inch of water coming in the back, we're going to get 33 gallon per minute coming out of this faucet. I like to picture a 55 gallon drum being filled up in about 1 1/2 minutes. That's a lot of water! As compared to a 1/2" faucet that would fill that same 55 gallon drum up in 25 minutes. So, whatever application you're using where you want a lot of water to fill something up quickly, you always want to go with the Fisher 3/4" faucet. Some of the applications where you may consider a Fisher 3/4" faucet would be pot sinks, scullery sinks, steam jacketed kettles, large pots, and anywhere where you really want a lot of water to fill a vessel. Fisher 3/4" faucets come in 8" on center backsplash, 8" on center wall, single wall, and a variety of swing spouts that are a full 1" diameter for the flow rate.... from 14" all the way down to 8", so these are designed to fit virtually any application that you might need a lot of water very quickly. Thanks for watching!
With Fisher, finding a new faucet for your sink is easy! Start by figuring out your intended use. Do you need a controlled flow rate, or do you need a large volume of water quickly? Watch this video to learn what which faucet size is perfect for you!
Hi, this is Jeff. Today I'd like to talk to you about 1/2" faucets. Whenever we talk about 1/2" faucets or 3/4" faucets, everyone wants to know the difference. Why is a 1/2" faucet a 1/2" faucet? Why do we call it that? And really, it's all about the pipe thread. On the 1/2" faucet, the inside diameter of the pipe is exactly a 1/2". That's why we call it a 1/2". The outside dimension is 3/4", which matches up a 3/4" outside, and a 1/2" on the inside, for a 1/2" faucet. That's what a 1/2" faucet is. Okay, so Fisher makes a variety of different types of different configurations of faucets. We make deck mount faucets, wall mount faucets, and backsplash mount faucets. When it comes to the spout, we make swing spouts, gooseneck spouts, double-jointed spouts, control spouts.... If you refer to the catalog, certainly you can find a faucet that would be perfect for your application. In addition to different styles of mounting and spout configurations, we also offer a variety of handles. Standard on all Fisher faucets is the standard lever handle; however, you can also pick up the optional cross handles and optional wrist blade handles. There's two things that we do differently that make Fisher the most specified brand in commercial foodservice. And that is... the first thing we do, is we use a stainless steel seat that's guaranteed for life. The reason why is that water is very corrosive and brass is very soft. Everyone else uses brass seats, so as the water flows in the bottom of the faucet and makes that first 90 degree turn to exist the faucet, the water will erode the brass seat. We use stainless steel seats that are screwed and glued into the faucet body, and we guarantee those for life. The second thing that we do is we use a two-part swivel stem, and what I mean by that is that at the end of the stem there is a seat washer. The seat washer is on a swivel, so that as the stem screws down the faucet body, as the seat washer makes contact with the stainless steel seat, it becomes a plunging action, rather than if this were all one piece, it would be a twisting and grinding action. Others all use a one-piece stem similar to this stem where the seat washer is attached right to the stem; so as this stem screws down through the body of the faucet and it makes contact with that seat, this seat washer is being torn up by an eroded brass seat. With Fisher, because it's on a swivel, as soon as this seat washer makes contact with the seat, it becomes more of a plunging action. This means longer life, lower maintenance. This is why we are specified. Just to recap, Fisher uses stainless steel seats that are guaranteed for life a two-part swivel stem for lower maintenance. So there's our 1/2" faucet line. Thanks for listening.
Don't be fooled into thinking that all faucets are made the same! Fisher engineers their 1/2" faucets for maximum longevity and minimum maintenance, providing you with a product that's guaranteed to last. Watch this short video to learn about the features that make Fisher superior in quality and reliability.
Fisher 1821 Details
This Fisher 1821 deck mounted faucet is the perfect solution when you need a reliable water fixture in your facility. It boasts a set of 8" centers for easy installation while its 6" swivel gooseneck nozzle and 2.2 GPM aerator deliver excellent water flow in any application. Additionally, this faucet is engineered for maximum durability. Unlike brass seats which can erode over time, this faucet's seat design incorporates stainless steel that won't pit or break down. The faucet stem also comes in a 2-part swivel configuration that prevents the seat washer from grinding against the faucet seat and further increases product life. The water flow is controlled by 2 lever handles.
Because this item is not stocked in our warehouse, processing, transit times and stock availability will vary. If you need your items by a certain date,
please contact us prior to placing your order. Expedited shipping availability may vary. We cannot guarantee that this item can be cancelled off of the order or returned once it is placed.
This product contains chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm.