Ok, just to clarify, I fall under upc(2006 edition). Will be adopting 09 within the next year.

06 UPC states this answer(as does this quiz). I actually had to look this one up because I also thought it was 6 feet(and Milo, thanks for joining the discussion, as I believe you also fall under upc)

Answer for this one is,, A, four feet.

I will try to give UPC reference(when I can actually find them). I would like to give other code reference, but I just don't have the time or access to all code books.

Here's the 06 upc reference. Table 3-2.

Tom, from what I have read in my book, you are correct about cast iron. But there are some variances. My book says horizontal cast iron must be supported at every joint. So if they are five foot lengths, then every five foot, but if they are smaller pipes, they do come in ten footers, which means they can be hung every ten foot. I haven't dealt with much new cast at all, so I have no idea what lengths they come in( or used to come in). I know that most of the cast I've torn out was five foot lengths, which means five foot hanger would make sense.

Its too late but I was ready to post A every 4 feet will give you 2 per 10 ft.

We used cast iron in 3 ft , 5ft, 7 ft and 10 ft lengths. Mainly for undergound in slab and we used nohubs clamps.

I forget how much a 10 ft length of 4 inch cast weighs but my body will never forget carrying them over the ditches in Rochester Ny early 80's.

Every 4 feet for plastics in my code book as well, Lee... ;) Every joint for cast iron.

Kind of jumped the gun and gave the answer early yesterday instead of waiting till today, sorry.

Here's today's question.

#7. when sizing a copper fuel-gas piping system that has an inlet pressure of less than 2psi with a pressure drop of 0.3 inch w.c. the maximum cubic feet per hour of gas flow allowed through a 5/8 inch O.D. ACR tube 75 feet in developed length is_______.

A. 13
B. 27
C. 48
D. 68.

I had to just guess on this one, and I got it wrong. Still have a tough time remembering it, good luck.

Answer to # 7 is B.

#8. A type B-W gas vent shall terminate at least ________ feet in vertical height above the bottom of the wall furnace.

A. 4
B. 5.
C. 10
D. 12.

They do get more interesting, or at least I think they do. I would skip some of these, but wheres the fun in that.

B is my shot

Answer is D.

Kind of a trick question. Key words are, bottom of wall furnace. I always think five also, thinking of termination above the top of an applience. I got this one wrong too. Oh well. On to the next.

#9. the maximum horizontal distance of a trap arm is measured from the inner edge of the vent to the ________.

A. weir of trap
B. dip
C. inlet
D. outlet

. The maximum horizontal distance of a trap arm is measured from the inner edge of the vent to the weir of the trap. (A)

Yep, A it is.. See, at least some of our codes read the same. Lol.


I know, I don't like this next question either,, who uses 2 1/2 inch pipe amymore, if they ever did?

#10. The maximum number of lavatories on a 2 1/2 inch horizontal waste line is ________.

A. 8
B. 14
C. 16
D. 24

Well, I might not check in again for a couple days, camping is calling me again. Wife just bought me a new tent, so were going to try it with both girls and mom. Wish us luck. And have a great weekend everyone.

Quote:

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The maximum number of lavatories on a 2 1/2 inch horizontal waste line is ___24_____. At 1/4" fall to the foot.

---

SPC will allow 31 on a drain line that's 1/2" to the foot. (Chapter 13, Table # 1305.2 SPC) Have a great time on your camping trip. Tom

Camping was once again a great time. Even saw fireflys for the first time in my neck of the woods. Ive seen them down south (when I was a kid visiting my dads family) but never in Montana.

Okay, back to the business at hand.

My code states answer B. 14 for horizontal(based on 1/4 inch per foot). 32 for verical.

However, for vent pipe units, it states 24(horizontal and vertical). Table 7-5, UPC.

This is what I was looking for. The differences in codes(and sometimes they are quite significant). Good to know. Thanks for the back and forth Tom.


#11. Sleeves shall be provided to protect all piping through_____and ________walls.

A. floors, concrete
B. concrete, masonry
C. wood, concrete
D. none of the above.

11. Sleeves shall be provided to protect all piping through (B) concrete and masonry walls.

Looks like it just you and me.lol.

Yep, 11 is B.

#12. Pex piping installed horizontally must be supported every_____ inches.

A. 24
B. 32
C. 36
D. 48

I would say A. 24 inches

. Pex piping installed horizontally must be supported every__32___ inches.
With 2 pipe straps at every bend.

All right, here's the answer given in my code(upc). B, 32 inches.

I personally like to hang it every 18 to 24 inces just strictly for appearance. But even then its tough to make this stuff look good when exposed. Don't get me wrong, I love the pex, but I try to use it mosty in concealed or covered areas, and still use copper in mechanical rooms etc, for the looks of it. Now, in crawl spaces, I've been known to go over the 32" code. Sometimes in a tight crawl space i just wanna get that stuff up and get the hell out. lol.

Heres lucky number 13.

#13. the minimum common horizontal waste pipe serving a bathtub, a lavatory, and a kitchen sink shall be at least ________.

A. 1 1/2"
B. 2"
C. 2 1/2"
D. 3"

I'm going with B...

MARK

#13. The minimum common horizontal waste pipe serving a bathtub, a lavatory, and a kitchen sink shall be at least ____2"__.
A lavatory, Bathtub and a kitchen simk add up to 5 fixture units.
A 2" drain line will accept 6 fixture units
Next question!

#13 D 3 inch

Hi all:

Funny, in my area a 2" horizontal drain can have a maximum load of 6 fixture units... ;)

I swear... I wish they could standardize the code a little more.

Love the questions Lee...

MARK

my Bad!! You're right it's 2" I looked at the wrong table in my code book TOM