Best Answer

A trap on a positive drain is used to avoid the 'contaminated' air in a HVAC system from traveling through the condensate line and entering into areas where it is unwanted. The trap becomes necessary when one condensate line is used for multiple units, especially if it is tied to other negative pressure drain traps. The negative pressure drain traps may not drain properly if they have to overcome the positive non- trapped pressure of another unit. It allows the condensate to drain more evenly, as well. Without a trap, the positive pressure from the unit can blow air through the drain with the water and cause 'spitting.' A trap on a positive pressure system may not always be necessary, but it is good practice to trap every drain and trap it properly. There are guidelines for both positive and negative pressure traps. Always follow the manufacturers recommendations.

Q: Dose a positive pressure drain need a trap?

Write your answer...

Submit

Still have questions?

Continue Learning about Math & Arithmetic

my blood is a positif i need blood what i do ?

Negative 5. It's normal division, except you need to remember these rules: Positive & Negative = Negative Positive & Positive = Positive

Well it depends on if you are talking mathematical or scientific.

A negative. If you have a string of positive and negative numbers multiplied together, all you need to find the sign of the answer is to find the parity of the negative numbers. If there are an odd number of negatives then the answer is negative and if there are an even number of negatives then the answer is positive. Remember, positive numbers make no difference to the sign of the answer.

factors are the numbers you multiply together to get a product in a multiplication problem. a positive times a positive = a positive a positive times a negative = a negative a negative times a negative = a positive since you are looking for negative 10, you need one factor to be positive and one to be negative. this could be: -1*10 -10*1 -2*5 -5*2

Related questions

35

No.

no

No

Dose Deportes means Sports Dose You probably need to word it better like: "You need a dose of sports" meaning you need to try some sports or you need exercise

They gurgle because of the sudden release of air. You have this gurgle because your vent pipes are either stopped up, in the wrong place, or are iadequate in size. When you drain water the you put pressure on the air in the drain lines. This pressure is actually sewage gas and should go out through your vent stack(s). You will need to repair or reppace your vents for this problem to be corrected.

To determine the net positive suction head available (NPSHA), you need to calculate the total fluid pressure at the pump suction inlet (including atmospheric pressure, fluid pressure, and velocity head), then subtract the vapor pressure of the fluid at the operating temperature and pressure. If the calculated NPSHA is greater than the net positive suction head required (NPSHR) for the pump, it is considered adequate for proper pump operation.

Depends on your code. If you have a PRV or, as you would say, pressure reducing valve on your water supply to your house, you need an expansion tank. If your pressure is above 80 psi, you need a PRV AND an expansion tank.

This is done at the pressure tank. First drain the tank with pump off, then check air pressure at the tank top nipple. It should be above 26 psi. If not this is your problem. You may need a new tank or it it's a 'galvanised ' tank , a new air charge. You may also need the pressure switch adjusted, or even a new one. -Call a well technician for an expert opinion and repair.This is done at the pressure tank. First drain the tank with pump off, then check air pressure at the tank top nipple. It should be above 26 psi. If not this is your problem. You may need a new tank or it it's a 'galvanised ' tank , a new air charge. You may also need the pressure switch adjusted,or even a new one.-Call a well technician.

Peer pressure can take on different forms such as direct pressure, indirect pressure (like influencing behaviors through actions or comments), individual pressure (when a person feels the need to conform to a group), and self-imposed pressure (setting personal standards based on what one perceives to be expected by peers).

welll too drain it an ac 1994 suburband u need too pull the plug out of it and drain it welll too drain it an ac 1994 suburband u need too pull the plug out of it and drain it

Probably not. There is no vent for that drain, it did not need one for a floor drain. A toilet is trying to push against the air pressure in the drain.Normally a decent plumber will install a floor drain with in 15 feet of a vented line or will vent the FD in case irt exceeds the 15 ft ruleA Floor drain can be as small as 2" diameter and thus it is undersized for a toilet and a floor drain alread has a trap and a toilet would thus be drouble trapped