surging

[sap runner]

I had sap going into my releaser more or less a steady stream but now it seems to surge a bunch then slow then back to surge,checked the main lines and all ok.still the same 19 inches.Anyone got the answer????????????

[sapman]

Well I thought I always heard it was air getting in. But since you checked everything, you should have found anything major. Maybe still could be lots of small leaks adding up.

[mapleack]

You probably have a low spot in the mainline somewhere that is filling full then you get the surge of sap coming through.

[3rdgen.maple]

Sag or ice..

[syrup2nv]

I had sap going into my releaser more or less a steady stream but now it seems to surge a bunch then slow then back to surge,checked the main lines and all ok.still the same 19 inches.Anyone got the answer????????????

Add a dry line system! That should fix all of your surging problems.

[sap runner]

not sure what a dry line is ?

[lew]

Dry lines will not solve your surging problems. I have 1 1/4 wet/dry line system and still get surges even during low flows if there is a sag in the wet line. Sounds to me like you have a sag somewhere.

[brookledge]

sap runner
Since you only have 250 on vac. then i'm assuming your mainline is pretty short.
A dry line is a seperate main line that runs above the wet line. Then at desired increments it is connected to the wet line. usually the term vacuum booster is used. Lets say you have a 1" wet line and a 1"dry line. Most will then use a larger diameter pipe to connect the two together like a 4" pvc. As the sap and air(gasses from the tree) run down the wet line it causes turbulences since the air tries to go faster than the sap can. When the air gets to the booster it will allow the gasses up into the 4" pvc and since the diameter is much larger the sap can't jump into the dry line. That way you seperate the air from the liquid.
also should your wet line freeze up at night and the sap begins to run before it thaws the dry line can then become a wet line until it warms up
Keith

[syrup2nv]

sap runner
Since you only have 250 on vac. then i'm assuming your mainline is pretty short.
A dry line is a seperate main line that runs above the wet line. Then at desired increments it is connected to the wet line. usually the term vacuum booster is used. Lets say you have a 1" wet line and a 1"dry line. Most will then use a larger diameter pipe to connect the two together like a 4" pvc. As the sap and air(gasses from the tree) run down the wet line it causes turbulences since the air tries to go faster than the sap can. When the air gets to the booster it will allow the gasses up into the 4" pvc and since the diameter is much larger the sap can't jump into the dry line. That way you seperate the air from the liquid.
also should your wet line freeze up at night and the sap begins to run before it thaws the dry line can then become a wet line until it warms up
Keith

Good explaination!